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Posted: 2/21/2016 9:58:10 PM EDT
[#1]
Have you ran this lower with a known working upper? What is the buffer spring and weight?
How did this upper perform before the piston conversion? The gas port may be sized for direct impingement operation. Not as a piston. Does the gas piston conversion recommend a port size? Inspect the new bolt lugs for unusual wear. Whenever I change any of the above items I over oil the bolt, carrier and charging handle and hand cycle, clean and reoil. Insect for any odd wear patterns. |
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Posted: 2/21/2016 10:15:48 PM EDT
[#2]
Quote HistoryQuoted:
Have you ran this lower with a known working upper? What is the buffer spring and weight? How did this upper perform before the piston conversion? The gas port may be sized for direct impingement operation. Not as a piston. Does the gas piston conversion recommend a port size? Inspect the new bolt lugs for unusual wear. Whenever I change any of the above items I over oil the bolt, carrier and charging handle and hand cycle, clean and reoil. Insect for any odd wear patterns. Rifle was purpose built. The upper was built for the lower. The lower was built for the upper. I have not tried an upper from another rifle. Piston gas block is .750 and the barrel is a Green Mountain GM-M10 7.62X39mm barrel also for .750. I can't find anything on Adams Arms website about specific port size or anything in the instruction manual. The rifle was not DI before I installed the piston kit. It was built as a piston rifle. Looked over the instruction manual and I'm thinking I did not have it installed properly. I readjusted it and I'll get it back out to the range this week to see if it's functioning better. I'll report back here when I do. |
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Posted: 2/22/2016 9:49:58 AM EDT
[#3]
Please email [email protected] for some troubleshooting questions. We will get this worked out and get this build running.
Cody Adams Arms Customer Service |
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Posted: 2/22/2016 10:15:39 AM EDT
[#4]
Quote HistoryQuoted:
Please email [email protected] for some troubleshooting questions. We will get this worked out and get this build running. Cody Adams Arms Customer Service Thanks for the response, Cody. I'll shoot you an email now. Cody, I just tried to send you an email but it's coming back as "Undeliverable". |
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Posted: 2/22/2016 10:39:07 AM EDT
[#5]
I think you are undergassed.
Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" |
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Posted: 2/22/2016 10:52:12 AM EDT
[#6]
Quote HistoryQuoted:
I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" Yeah, I figured that but Green Mountain doesn't give gas port sizes. I guess I could go home and measure the port. If it is too small could I re-drill/ream it? Of course I'll be taking it back to the range to test it before I go that route. Not to mention I'd like to exhaust every possible other issue before getting to that point. |
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Posted: 2/22/2016 11:26:55 AM EDT
[#7]
If you go up in size(drill) go about .005 at a time if you can.
Let us know what your gas port size is now if you check it. |
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Posted: 2/22/2016 11:43:13 AM EDT
[#8]
Quote HistoryQuoted:
If you go up in size(drill) go about .005 at a time if you can. Let us know what your gas port size is now if you check it. I'm going to try taking it to the range again first. I readjusted how it was installed and it seems to move more freely in the upper. If I still have the same results I'll measure the gas port. |
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Posted: 2/22/2016 12:28:14 PM EDT
[#9]
Quote HistoryQuoted:
I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" I commented on your other post and use above sizes I messed up my decimal points on the other post but I drilled out my 7.62x39 10.5 barrel for my syrac piston kit and works flawlessly now. I also am running the taccom 10 percent less buffer spring and the 1 oz buffer from taccom also |
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Posted: 2/22/2016 12:51:12 PM EDT
[#10]
Quote HistoryQuoted:
I commented on your other post and use above sizes I messed up my decimal points on the other post but I drilled out my 7.62x39 10.5 barrel for my syrac piston kit and works flawlessly now. I also am running the taccom 10 percent less buffer spring and the 1 oz buffer from taccom also Quote HistoryQuoted:
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I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" I commented on your other post and use above sizes I messed up my decimal points on the other post but I drilled out my 7.62x39 10.5 barrel for my syrac piston kit and works flawlessly now. I also am running the taccom 10 percent less buffer spring and the 1 oz buffer from taccom also My barrel is 16" in length. Does the port hole size matter with barrel length? I'm also using a rifle length buffer tube with a rifle spring and buffer. I'd still like to get it ot the range one more time with the changes I've made to the piston system before drilling/reaming the gas port. |
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Posted: 2/22/2016 2:01:33 PM EDT
[#11]
Yes, barrel length and location(carbine, mid, rifle) of gas port does matter.
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Posted: 2/22/2016 2:03:37 PM EDT
[#12]
Quote HistoryQuoted:
Yes, barrel length and location(carbine, mid, rifle) of gas port does matter. That's what I thought. It's Carbine length so what size would the hole need to be for an Adams kit? I am still unable to send an email to Cody from Adams Arms; the emails all come back as undeliverable. I think I figured it out, he's got an "f" in his email where there shouldn't be one. Hopefully he gets it now. |
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Posted: 2/22/2016 2:09:27 PM EDT
[#13]
[email protected], sorry about that.
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Posted: 2/22/2016 2:11:38 PM EDT
[#14]
Quote HistoryIt's all good. I eventually figured it out; after racking my brain trying to figure out what the "F" stood for  and then realizing it shouldn't be there. You should have an email from me. Thanks again.
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Posted: 2/22/2016 2:12:21 PM EDT
[#15]
Double tap.
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Posted: 2/22/2016 3:18:59 PM EDT
[#16]
Quote HistoryQuoted:
My barrel is 16" in length. Does the port hole size matter with barrel length? I'm also using a rifle length buffer tube with a rifle spring and buffer. I'd still like to get it ot the range one more time with the changes I've made to the piston system before drilling/reaming the gas port. Quote HistoryQuoted:
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I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" I commented on your other post and use above sizes I messed up my decimal points on the other post but I drilled out my 7.62x39 10.5 barrel for my syrac piston kit and works flawlessly now. I also am running the taccom 10 percent less buffer spring and the 1 oz buffer from taccom also My barrel is 16" in length. Does the port hole size matter with barrel length? I'm also using a rifle length buffer tube with a rifle spring and buffer. I'd still like to get it ot the range one more time with the changes I've made to the piston system before drilling/reaming the gas port. you should be running a carbine length buffer spring and buffer weight that may be the issue right there |
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Posted: 2/22/2016 4:19:17 PM EDT
[#17]
Quote HistoryQuoted:
you should be running a carbine length buffer spring and buffer weight that may be the issue right there Quote HistoryQuoted:
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I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" I commented on your other post and use above sizes I messed up my decimal points on the other post but I drilled out my 7.62x39 10.5 barrel for my syrac piston kit and works flawlessly now. I also am running the taccom 10 percent less buffer spring and the 1 oz buffer from taccom also My barrel is 16" in length. Does the port hole size matter with barrel length? I'm also using a rifle length buffer tube with a rifle spring and buffer. I'd still like to get it ot the range one more time with the changes I've made to the piston system before drilling/reaming the gas port. you should be running a carbine length buffer spring and buffer weight that may be the issue right there It shouldn't matter. 16" barrel will run with rifle stock or collapsible stock as long as receiver extension, springs and buffers are correct. |
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Posted: 2/22/2016 4:53:01 PM EDT
[#18]
Quote HistoryQuoted:
It shouldn't matter. 16" barrel will run with rifle stock or collapsible stock as long as receiver extension, springs and buffers are correct. Quote HistoryQuoted:
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I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" I commented on your other post and use above sizes I messed up my decimal points on the other post but I drilled out my 7.62x39 10.5 barrel for my syrac piston kit and works flawlessly now. I also am running the taccom 10 percent less buffer spring and the 1 oz buffer from taccom also My barrel is 16" in length. Does the port hole size matter with barrel length? I'm also using a rifle length buffer tube with a rifle spring and buffer. I'd still like to get it ot the range one more time with the changes I've made to the piston system before drilling/reaming the gas port. you should be running a carbine length buffer spring and buffer weight that may be the issue right there It shouldn't matter. 16" barrel will run with rifle stock or collapsible stock as long as receiver extension, springs and buffers are correct. Yeah, I only have two rifles running a carbine gas system and carbine buffer springs and buffers, the other two run carbine gas systems but rifle buffer springs and buffers. This is the only one I've had a problem with and I'm thinking it's a gas problem like was mentioned. Oddly enough all of my rifles run 16" barrels except for the first one I build and that has a 14.5" barrel with a 2" brake pinned and welded to it. |
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Posted: 2/23/2016 7:20:25 AM EDT
[#19]
Quote HistoryQuoted: My barrel is 16" in length. Does the port hole size matter with barrel length? I'm also using a rifle length buffer tube with a rifle spring and buffer. I'd still like to get it ot the range one more time with the changes I've made to the piston system before drilling/reaming the gas port. That's a big part you left out of the 1st post. Try the upper on your carbine buffer and spring lower |
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Posted: 2/23/2016 8:19:35 AM EDT
[#20]
Quote HistoryQuoted:
That's a big part you left out of the 1st post. Try the upper on your carbine buffer and spring lower Quote HistoryQuoted:
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My barrel is 16" in length. Does the port hole size matter with barrel length? I'm also using a rifle length buffer tube with a rifle spring and buffer. I'd still like to get it ot the range one more time with the changes I've made to the piston system before drilling/reaming the gas port. That's a big part you left out of the 1st post. Try the upper on your carbine buffer and spring lower Yeah, sorry about that. Spoke to Cody from Adams Arms last night and they age going to let me exchange the standard carrier I got in the kit for the light weight carrier and I've also ordered a carbine stock, buffer tube and I already have a carbine spring sitting in my parts box. He thinks in going to have to drill the port out as well. |
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Posted: 2/23/2016 12:30:29 PM EDT
[#21]
the light weight carrier should work better actually more adjustment in the piston system
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Posted: 2/23/2016 12:45:26 PM EDT
[#22]
Quote HistoryQuoted:
the light weight carrier should work better actually more adjustment in the piston system I probably should've ordered the low mass carrier from the get-go like I had originally planned. I knew the 39 round was low pressure but didn't realize the heavier carrier was going to make that big of a difference. |
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Posted: 2/23/2016 1:39:49 PM EDT
[#23]
I run a standard carrier with the syrac kit because they don't offer a low mass one and it works good with the reduced buffer spring and 1 oz buffer
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Posted: 2/23/2016 1:42:02 PM EDT
[#24]
Quote HistoryQuoted:
I run a standard carrier with the syrac kit because they don't offer a low mass one and it works good with the reduced buffer spring and 1 oz buffer Where did you get a 1 ounce buffer? I've only ever found ones 3.0 ounces; just ordered one this weight. Did you remove the weights from a 3.8 ounce carbine buffer? |
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Posted: 2/23/2016 2:55:39 PM EDT
[#25]
Quote HistoryQuoted:
Where did you get a 1 ounce buffer? I've only ever found ones 3.0 ounces; just ordered one this weight. Did you remove the weights from a 3.8 ounce carbine buffer? Quote HistoryQuoted:
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I run a standard carrier with the syrac kit because they don't offer a low mass one and it works good with the reduced buffer spring and 1 oz buffer Where did you get a 1 ounce buffer? I've only ever found ones 3.0 ounces; just ordered one this weight. Did you remove the weights from a 3.8 ounce carbine buffer? nope look up taccom buffer http://www.tacticallink.com/Taccom-Reduced-Recoil-Rifle-Buffer-Spring-for-AR15.html that and this http://www.tacticallink.com/Taccom-Ultra-Lightweight-Carbine-Buffer-for-AR15.html works great no bolt bounce and lightens recoil to me |
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Posted: 2/23/2016 4:12:45 PM EDT
[#26]
Quote HistoryQuoted:
nope look up taccom buffer http://www.tacticallink.com/Taccom-Reduced-Recoil-Rifle-Buffer-Spring-for-AR15.html that and this http://www.tacticallink.com/Taccom-Ultra-Lightweight-Carbine-Buffer-for-AR15.html works great no bolt bounce and lightens recoil to me Quote HistoryQuoted:
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I run a standard carrier with the syrac kit because they don't offer a low mass one and it works good with the reduced buffer spring and 1 oz buffer Where did you get a 1 ounce buffer? I've only ever found ones 3.0 ounces; just ordered one this weight. Did you remove the weights from a 3.8 ounce carbine buffer? nope look up taccom buffer http://www.tacticallink.com/Taccom-Reduced-Recoil-Rifle-Buffer-Spring-for-AR15.html that and this http://www.tacticallink.com/Taccom-Ultra-Lightweight-Carbine-Buffer-for-AR15.html works great no bolt bounce and lightens recoil to me Its funny you mention Taccom, as soon as I posted my question to you I Googled "1 ounce buffer" and that website came up. I immediately bookmarked it and will be placing an order. |
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Posted: 2/23/2016 4:27:10 PM EDT
[#27]
Quote HistoryQuoted:
I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" OK so from talking with Cody at Adams Arms he suggests a gas port anywhere between 0.075" - 0.085". I currently have brand new drill bits in 0.061.5" (1/16"), 0.076.5" (5/64) and 0.092.5" (3/32) the next drill bit I have is measuring at 0.108" (7/64) and I'm afraid would be too much. If I open the port up to 0.076.5" would that be OK? I do not have a hole reamer. |
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Posted: 2/23/2016 6:14:45 PM EDT
[#28]
Quote HistoryQuoted:
OK so from talking with Cody at Adams Arms he suggests a gas port anywhere between 0.075" - 0.085". I currently have brand new drill bits in 0.061.5" (1/16"), 0.076.5" (5/64) and 0.092.5" (3/32) the next drill bit I have is measuring at 0.108" (7/64) and I'm afraid would be too much. If I open the port up to 0.076.5" would that be OK? I do not have a hole reamer. Quote HistoryQuoted:
Quoted:
I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" OK so from talking with Cody at Adams Arms he suggests a gas port anywhere between 0.075" - 0.085". I currently have brand new drill bits in 0.061.5" (1/16"), 0.076.5" (5/64) and 0.092.5" (3/32) the next drill bit I have is measuring at 0.108" (7/64) and I'm afraid would be too much. If I open the port up to 0.076.5" would that be OK? I do not have a hole reamer. I sent mine off to Samson the rail company thinking the barrel was whipping and hitting the rail and they said send it to us and we will fix it no questions asked. turns out it wasn't the rail it was the gas hole. they said they tried it drilled out to .092 and it would work but it wasn't getting enough gas to be adjustable so they went to .109 or .108 either way I can have the gas at the 6 position out of 16 possible positions and give me room to adjust the piston when I suppress it and maybe run sub sonic ammo so up to you I would not worry about opening it up to .092 should have a problem. got to love trouble shooting huh |
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Posted: 2/23/2016 6:24:43 PM EDT
[#29]
Quote HistoryQuoted:
I sent mine off to Samson the rail company thinking the barrel was whipping and hitting the rail and they said send it to us and we will fix it no questions asked. turns out it wasn't the rail it was the gas hole. they said they tried it drilled out to .092 and it would work but it wasn't getting enough gas to be adjustable so they went to .109 or .108 either way I can have the gas at the 6 position out of 16 possible positions and give me room to adjust the piston when I suppress it and maybe run sub sonic ammo so up to you I would not worry about opening it up to .092 should have a problem. got to love trouble shooting huh Quote HistoryQuoted:
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I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" OK so from talking with Cody at Adams Arms he suggests a gas port anywhere between 0.075" - 0.085". I currently have brand new drill bits in 0.061.5" (1/16"), 0.076.5" (5/64) and 0.092.5" (3/32) the next drill bit I have is measuring at 0.108" (7/64) and I'm afraid would be too much. If I open the port up to 0.076.5" would that be OK? I do not have a hole reamer. I sent mine off to Samson the rail company thinking the barrel was whipping and hitting the rail and they said send it to us and we will fix it no questions asked. turns out it wasn't the rail it was the gas hole. they said they tried it drilled out to .092 and it would work but it wasn't getting enough gas to be adjustable so they went to .109 or .108 either way I can have the gas at the 6 position out of 16 possible positions and give me room to adjust the piston when I suppress it and maybe run sub sonic ammo so up to you I would not worry about opening it up to .092 should have a problem. got to love trouble shooting huh Troubleshooting is fun. Actually I just chucked the 5/64 bit up in my drill and it dropped through the hole so it's already at 0.76.5". I think I'll hold off on trying to open it up and just wait till I get the low mass carrier from Cody at Adams; I just dropped the standard weight carrier in the mail this afternoon. Then I'll change out the stock for the carbine stock, buffer and see if that helps. If not then I'll open it up. |
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Posted: 2/23/2016 9:15:59 PM EDT
[#30]
What size bit do you want?
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Posted: 2/23/2016 9:23:00 PM EDT
[#31]
Quote HistoryQuoted:
What size bit do you want? I'm not sure what bit I'd need. The port is already at 0.076.5" I'm going to try the rifle again with lighter components and see how it fares before I open the port. |
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Posted: 2/24/2016 11:58:48 AM EDT
[#32]
Quote HistoryQuoted:
Troubleshooting is fun. Actually I just chucked the 5/64 bit up in my drill and it dropped through the hole so it's already at 0.76.5". I think I'll hold off on trying to open it up and just wait till I get the low mass carrier from Cody at Adams; I just dropped the standard weight carrier in the mail this afternoon. Then I'll change out the stock for the carbine stock, buffer and see if that helps. If not then I'll open it up. Quote HistoryQuoted:
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I think you are undergassed. Both of my carbine length gas DI 7.62X39 AR's have larger gas PORTS, .1065 and .095 Good luck. Edit, these are gas PORT sizes, not gas block journal size. Both of my gas block journals are .750" OK so from talking with Cody at Adams Arms he suggests a gas port anywhere between 0.075" - 0.085". I currently have brand new drill bits in 0.061.5" (1/16"), 0.076.5" (5/64) and 0.092.5" (3/32) the next drill bit I have is measuring at 0.108" (7/64) and I'm afraid would be too much. If I open the port up to 0.076.5" would that be OK? I do not have a hole reamer. I sent mine off to Samson the rail company thinking the barrel was whipping and hitting the rail and they said send it to us and we will fix it no questions asked. turns out it wasn't the rail it was the gas hole. they said they tried it drilled out to .092 and it would work but it wasn't getting enough gas to be adjustable so they went to .109 or .108 either way I can have the gas at the 6 position out of 16 possible positions and give me room to adjust the piston when I suppress it and maybe run sub sonic ammo so up to you I would not worry about opening it up to .092 should have a problem. got to love trouble shooting huh Troubleshooting is fun. Actually I just chucked the 5/64 bit up in my drill and it dropped through the hole so it's already at 0.76.5". I think I'll hold off on trying to open it up and just wait till I get the low mass carrier from Cody at Adams; I just dropped the standard weight carrier in the mail this afternoon. Then I'll change out the stock for the carbine stock, buffer and see if that helps. If not then I'll open it up. it is fun that's what I say 5.56 is just to easy to put together and know its gonna work hahah and I think those changes will help alot |
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Posted: 2/28/2016 10:16:25 AM EDT
[#33]
I had the same problem. My build now has the low mass carrier, adjustable gas block, lighter buffer and I opened up the port size (Forget what size). It works great now, except for the XLP adjustable gas block freezing up after light use.
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Posted: 2/28/2016 10:26:32 AM EDT
[#34]
Quote HistoryQuoted:
I had the same problem. My build now has the reduced weight carrier, adjustable gas block, lighter buffer and I opened up the port size (Forget what size). It works great now, except for the XLP adjustable gas block freezing up after light use. I wish they made an five position adjustable block with a rail on it like they do for the two position block. Adams received my Standard Weight Carrier on Friday afternoon. I spoke to Cody after he got it and he says he'll be doing exchanges on Tuesday. |
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Posted: 3/6/2016 9:37:48 PM EDT
[#35]
Just updating this thread with a thank you to Cody at Adams Arms. I received my new carrier yesterday. Got it installed with a carbine stock, spring and buffer. I didn't get a chance to take it back to the range yet. But thanks, Cody for helping me out.
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Posted: 3/11/2016 2:08:28 AM EDT
[#36]
Any word on how it works yet?
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Posted: 3/11/2016 8:00:53 AM EDT
[#37]
Quote HistoryQuoted:
Any word on how it works yet? I should be taking it to the range on Sunday. I did not drill the gas port though. I'm going to run it with the carbine, stock/buffer and spring and the low mass carrier first and see how it runs before drilling the port out. |
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Posted: 3/11/2016 8:14:36 AM EDT
[#38]
Quote HistoryQuoted:
I probably should've ordered the low mass carrier from the get-go like I had originally planned. I knew the 39 round was low pressure but didn't realize the heavier carrier was going to make that big of a difference. Quote HistoryQuoted:
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the light weight carrier should work better actually more adjustment in the piston system I probably should've ordered the low mass carrier from the get-go like I had originally planned. I knew the 39 round was low pressure but didn't realize the heavier carrier was going to make that big of a difference. The carrier only makes a difference because AA was not designed to run a 7.62x39. My Black Rifle Arms 7.62x39 CAPS Upper runs carbine spring with h2 buffer with a full auto carrier and runs it flawlessly and the gas port is not drilled out huge either. When a system is designed for specific calibers you don't run into all these issues. |
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Posted: 3/11/2016 8:41:25 AM EDT
[#39]
Quote HistoryQuoted:
The carrier only makes a difference because AA was not designed to run a 7.62x39. My Black Rifle Arms 7.62x39 CAPS Upper runs carbine spring with h2 buffer with a full auto carrier and runs it flawlessly and the gas port is not drilled out huge either. When a system is designed for specific calibers you don't run into all these issues. Quote HistoryQuoted:
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the light weight carrier should work better actually more adjustment in the piston system I probably should've ordered the low mass carrier from the get-go like I had originally planned. I knew the 39 round was low pressure but didn't realize the heavier carrier was going to make that big of a difference. The carrier only makes a difference because AA was not designed to run a 7.62x39. My Black Rifle Arms 7.62x39 CAPS Upper runs carbine spring with h2 buffer with a full auto carrier and runs it flawlessly and the gas port is not drilled out huge either. When a system is designed for specific calibers you don't run into all these issues. I've always been confused on the whole H1, H2, H3 buffer thing. I usually just run standard 3 ounce or 3.5 ounce carbine buffers and I put a 3 ounce buffer in this rifle. What is the difference between them? |
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Posted: 3/11/2016 3:12:32 PM EDT
[#40]
Quote HistoryQuoted:
I've always been confused on the whole H1, H2, H3 buffer thing. I usually just run standard 3 ounce or 3.5 ounce carbine buffers and I put a 3 ounce buffer in this rifle. What is the difference between them? Quote HistoryQuoted:
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the light weight carrier should work better actually more adjustment in the piston system I probably should've ordered the low mass carrier from the get-go like I had originally planned. I knew the 39 round was low pressure but didn't realize the heavier carrier was going to make that big of a difference. The carrier only makes a difference because AA was not designed to run a 7.62x39. My Black Rifle Arms 7.62x39 CAPS Upper runs carbine spring with h2 buffer with a full auto carrier and runs it flawlessly and the gas port is not drilled out huge either. When a system is designed for specific calibers you don't run into all these issues. I've always been confused on the whole H1, H2, H3 buffer thing. I usually just run standard 3 ounce or 3.5 ounce carbine buffers and I put a 3 ounce buffer in this rifle. What is the difference between them? Bufers differ in weight and the heavier weight buffers slows the bolt carriers velocity down. |
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Posted: 3/12/2016 4:19:27 AM EDT
[#41]
I have the same setup, GM barrel and AA piston kit with the same issue initially. I installed the Wolfe reduced power spring with carbine buffer and the rifle has not missed a beat since. It is a sweet setup using CPD mags.
Forgot to mention my bolt is an ARP and the carrier is a mil-spec M16 auto. I just reread your initial post OP and you mention light primer strikes. Again, same problem on my rifle at first and a lot of folks go w/enhance power trigger springs to cure problem. I'm not a fan of that fix because of the increased wt. of trigger pull. An ALG trigger fixed my light primer strikes. Poor man/inexpensive fix, bend your trigger spring legs on current trigger. Good luck, hope this helps and you get her running, like someone else posted, 1/2 the fun is messing with these things to get them where you want. |
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Posted: 3/12/2016 8:52:39 AM EDT
[#42]
Quote HistoryQuoted:
I have the same setup, GM barrel and AA piston kit with the same issue initially. I installed the Wolfe reduced power spring with carbine buffer and the rifle has not missed a beat since. It is a sweet setup using CPD mags. Forgot to mention my bolt is an ARP and the carrier is a mil-spec M16 auto. I just reread your initial post OP and you mention light primer strikes. Again, same problem on my rifle at first and a lot of folks go w/enhance power trigger springs to cure problem. I'm not a fan of that fix because of the increased wt. of trigger pull. An ALG trigger fixed my light primer strikes. Poor man/inexpensive fix, bend your trigger spring legs on current trigger. Good luck, hope this helps and you get her running, like someone else posted, 1/2 the fun is messing with these things to get them where you want. I swapped the rifle length buffer tube, buffer and spring out to a carbine tube, butter and spring and installed Adams low mass carrier. I'm going to take it to the range tomorrow and give it a try. I also ordered a Wolf Extra Power trigger spring just in case I'm still getting light primer strikes. Hopefully the rifle will function. If not I'll try drilling the gas port. |
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Posted: 3/13/2016 12:26:41 PM EDT
[#43]
Range Report:
Took it back to the range with the Carbine stock/buffer and spring and Adams Low Mass carrier. It performed a bit better but I still had some issues. I managed to put 44 rounds through it before I packed it up and switched to my 6.8. I loaded up the first three mags; one had one round, the second had three rounds and the third mag had five rounds. First mag, fired, ejected, did not lock back. Second mag, fired all three rounds, ejected and locked back. Third mag, fired all five rounds, ejected and locked back. I then loaded the fourth and fifth mag with 10 rounds each (max capacity for my mags); I am using CPD 10 round mags. First mag loaded to ten fired all ten, ejected all 10 and locked back after the last round. Second mag; shit started going sideways, first round, failure to feed. In fact it pushed the round into the case: (I didn't think to take a pic of the round so I made an MS Paint instead)  " />
The second and third round in the second at capacity mag fired and ejected. BCG failed to pick up the fourth round; got a "click", I racked it, it chambered, fired and ejected. All other rounds fired and ejected but failed to lock back. And that's how it went for the rest of the shoot. Should I try and drill the barrel? I did order a Taccom Carbine buffer kit (they are at 2.4 ounces I believe); I really don't want to drill the barrel out if I can get it to run with a lighter buffer. The BCG, buffer and buffer spring were lubed to all hell. I have not pulled the rifle apart yet to clean/inspect. It did run a bit better but it's no where as reliable as my other rifles. |
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Posted: 3/13/2016 4:37:59 PM EDT
[#44]
Try the reduced power buffer spring, it slows the return of the bolt a bit and lets the mag push the next round up. Instead of the bolt waiting on the round the round is waiting on the bolt. The reduced power spring should allow the bolt to lock back, as I mentioned it did on mine.
Now I also polished my feed ramps after enlarging them with a dremmel. There are several videos on doing this. Sounds like you are getting close. Just thought of this, does the piston rod slide for a aft with no binding as you raise and lower the muzzle. Obviously, make sure that it does. I'm with you on not wanting to drill gas port. |
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Posted: 3/13/2016 6:36:22 PM EDT
[#45]
Quote HistoryQuoted:
Try the reduced power buffer spring, it slows the return of the bolt a bit and lets the mag push the next round up. Instead of the bolt waiting on the round the round is waiting on the bolt. The reduced power spring should allow the bolt to lock back, as I mentioned it did on mine. Now I also polished my feed ramps after enlarging them with a dremmel. There are several videos on doing this. Sounds like you are getting close. Just thought of this, does the piston rod slide for a aft with no binding as you raise and lower the muzzle. Obviously, make sure that it does. I'm with you on not wanting to drill gas port. I just ordered a Wolf Reduced Carbine Spring as well. Hopefully I can get this thing running like all my other rifles; it's definitely not as fun to shoot as it sits right now. |
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Posted: 3/14/2016 12:36:56 PM EDT
[#46]
Quote HistoryQuoted:
I just ordered a Wolf Reduced Carbine Spring as well. Hopefully I can get this thing running like all my other rifles; it's definitely not as fun to shoot as it sits right now. Quote HistoryQuoted:
Quoted:
Try the reduced power buffer spring, it slows the return of the bolt a bit and lets the mag push the next round up. Instead of the bolt waiting on the round the round is waiting on the bolt. The reduced power spring should allow the bolt to lock back, as I mentioned it did on mine. Now I also polished my feed ramps after enlarging them with a dremmel. There are several videos on doing this. Sounds like you are getting close. Just thought of this, does the piston rod slide for a aft with no binding as you raise and lower the muzzle. Obviously, make sure that it does. I'm with you on not wanting to drill gas port. I just ordered a Wolf Reduced Carbine Spring as well. Hopefully I can get this thing running like all my other rifles; it's definitely not as fun to shoot as it sits right now. your soo close man almost there congrats on getting this far I would try the springs and 1 oz buffer and maybe think about drilling the barrel out some but that's up to you |
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Posted: 3/20/2016 1:30:29 PM EDT
[#47]
Try chamfering bottom of gas block...worked for me on a 300 BLKOUT I built...just saying.
Ocho |
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Posted: 3/20/2016 6:28:27 PM EDT
[#48]
I would have used the Springco Yellow reduced spring rather than wolf. But I would try that with the Taccom buffer.
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Posted: 3/20/2016 7:09:03 PM EDT
[#49]
Quote HistoryQuoted:
I would have used the Springco Yellow reduced spring rather than wolf. But I would try that with the Taccom buffer. Oddly enough, I still have not received my Wolff Reduced Power spring yet. I was told it shipped out last Friday. I have my doubts. |
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Posted: 3/20/2016 7:39:57 PM EDT
[#50]
Quote HistoryQuoted:
Oddly enough, I still have not received my Wolff Reduced Power spring yet. I was told it shipped out last Friday. I have my doubts. Quote HistoryQuoted:
Quoted:
I would have used the Springco Yellow reduced spring rather than wolf. But I would try that with the Taccom buffer. Oddly enough, I still have not received my Wolff Reduced Power spring yet. I was told it shipped out last Friday. I have my doubts. It will probably be there tomorrow. However I always use Sprinco. Best quality springs I've ever owned. |
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