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I called them and they said to: Re-torque barrel Clean barrel Try match 150 or 175 grain ammo Shoot with a mount that isn't quick detach I have done all of those and it didn't solve the problem. I will call on Monday. View Quote View All Quotes View All Quotes Quoted:
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This isn't rocket surgery. Tell jp you are not happy with the results. Chances are you got a Friday barrel reamer was worn who the hell knows. Rather than burning up additional ammo call them and say you want to send it in. It is highly unlikely anything aside from the barrel is causing it to preform at 4 moa. I called them and they said to: Re-torque barrel Clean barrel Try match 150 or 175 grain ammo Shoot with a mount that isn't quick detach I have done all of those and it didn't solve the problem. I will call on Monday. Most definitely. JP does good work I have a 6.5 creedmoor barrel on order from them for a maten set. If you don't get responses from them please let us know but you should always give the company a chance to make right. The problem is that many shooters who 'build' there own have almost no experience. They barely attach the barrel then shoot shit 147 through it and then can't figure out why they are chasing groups. We can only figure things out based off of what you have told us and it wouldn't make sense for you to bs us. It sounds like you have the basics of shooting down and we can hopefully rule that out. For many people I would say try for bigger group offerings. Load a 10 round mag and put out a 9 shot group. You have done the things they asked now they should take the barrel back and give it a look. |
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Upper mock up, minus gas block and tube. Getting ready to send it off and have it assembled. And just waiting on my lower to arrive any day now. MATEN upper Fulton Armory (criterion) 16in LW barrel BCM gunfighter CH URX 3.1 Rubber City Armory BCG ADM mount PA ACSS 1-6x Griffin Flash Comp View Quote It's scary how close that's going to look like mine. I can't wait! Let me know how it works out, where are you sending it to get assembled? |
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http://i346.photobucket.com/albums/p411/sjopling/9683cf55-b630-491a-8f32-e2b7ed5ae911_zps31b56cf6.jpg Upper mock up, minus gas block and tube. Getting ready to send it off and have it assembled. And just waiting on my lower to arrive any day now. MATEN upper Fulton Armory (criterion) 16in LW barrel BCM gunfighter CH URX 3.1 Rubber City Armory BCG ADM mount PA ACSS 1-6x Griffin Flash Comp View Quote Just out of curiosity, why are you sending it out to be assembled? Nice rig, btw. Looks like it would be fun. |
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It's scary how close that's going to look like mine. I can't wait! Let me know how it works out, where are you sending it to get assembled? View Quote View All Quotes View All Quotes Quoted:
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Upper mock up, minus gas block and tube. Getting ready to send it off and have it assembled. And just waiting on my lower to arrive any day now. MATEN upper Fulton Armory (criterion) 16in LW barrel BCM gunfighter CH URX 3.1 Rubber City Armory BCG ADM mount PA ACSS 1-6x Griffin Flash Comp It's scary how close that's going to look like mine. I can't wait! Let me know how it works out, where are you sending it to get assembled? Boltcarrier.com |
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Just out of curiosity, why are you sending it out to be assembled? Nice rig, btw. Looks like it would be fun. View Quote View All Quotes View All Quotes Quoted:
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http://i346.photobucket.com/albums/p411/sjopling/9683cf55-b630-491a-8f32-e2b7ed5ae911_zps31b56cf6.jpg Upper mock up, minus gas block and tube. Getting ready to send it off and have it assembled. And just waiting on my lower to arrive any day now. MATEN upper Fulton Armory (criterion) 16in LW barrel BCM gunfighter CH URX 3.1 Rubber City Armory BCG ADM mount PA ACSS 1-6x Griffin Flash Comp Just out of curiosity, why are you sending it out to be assembled? Nice rig, btw. Looks like it would be fun. The URX requires a special wrench and I don't want to buy it. |
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http://i346.photobucket.com/albums/p411/sjopling/9683cf55-b630-491a-8f32-e2b7ed5ae911_zps31b56cf6.jpg Upper mock up, minus gas block and tube. Getting ready to send it off and have it assembled. And just waiting on my lower to arrive any day now. MATEN upper Fulton Armory (criterion) 16in LW barrel BCM gunfighter CH URX 3.1 Rubber City Armory BCG ADM mount PA ACSS 1-6x Griffin Flash Comp View Quote What gas block are you going to use? |
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http://i346.photobucket.com/albums/p411/sjopling/9683cf55-b630-491a-8f32-e2b7ed5ae911_zps31b56cf6.jpg Upper mock up, minus gas block and tube. Getting ready to send it off and have it assembled. And just waiting on my lower to arrive any day now. MATEN upper Fulton Armory (criterion) 16in LW barrel BCM gunfighter CH URX 3.1 Rubber City Armory BCG ADM mount PA ACSS 1-6x Griffin Flash Comp What gas block are you going to use? Just a standard set screw block I think I got from DD. Was really debating an adjustable but decided to go cheap and see what happens. Hopefully I won't regret it. |
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Quoted: Just a standard set screw block I think I got from DD. Was really debating an adjustable but decided to go cheap and see what happens. Hopefully I won't regret it. View Quote View All Quotes View All Quotes Quoted: Quoted: Quoted: http://i346.photobucket.com/albums/p411/sjopling/9683cf55-b630-491a-8f32-e2b7ed5ae911_zps31b56cf6.jpg Upper mock up, minus gas block and tube. Getting ready to send it off and have it assembled. And just waiting on my lower to arrive any day now. MATEN upper Fulton Armory (criterion) 16in LW barrel BCM gunfighter CH URX 3.1 Rubber City Armory BCG ADM mount PA ACSS 1-6x Griffin Flash Comp What gas block are you going to use? Just a standard set screw block I think I got from DD. Was really debating an adjustable but decided to go cheap and see what happens. Hopefully I won't regret it. I gotta tell ya, I went with the advice here and got an adjustable. Every night when I go to bed and every morning when I wake up I thank God that I listened to these guys. It was an essential piece of equipment for my project. |
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I gotta tell ya, I went with the advice here and got an adjustable. Every night when I go to bed and every morning when I wake up I thank God that I listened to these guys. It was an essential piece of equipment for my project. View Quote View All Quotes View All Quotes Quoted:
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http://i346.photobucket.com/albums/p411/sjopling/9683cf55-b630-491a-8f32-e2b7ed5ae911_zps31b56cf6.jpg Upper mock up, minus gas block and tube. Getting ready to send it off and have it assembled. And just waiting on my lower to arrive any day now. MATEN upper Fulton Armory (criterion) 16in LW barrel BCM gunfighter CH URX 3.1 Rubber City Armory BCG ADM mount PA ACSS 1-6x Griffin Flash Comp What gas block are you going to use? Just a standard set screw block I think I got from DD. Was really debating an adjustable but decided to go cheap and see what happens. Hopefully I won't regret it. I gotta tell ya, I went with the advice here and got an adjustable. Every night when I go to bed and every morning when I wake up I thank God that I listened to these guys. It was an essential piece of equipment for my project. Yeah, probably should have got one as well. We will see, the gas block is an easy swap if needed. |
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Another option is a blank gas block if you don't want to risk adjustment screws moving on their own or anything, but it takes a while to get the right size-
I used a blank gas block on a lightweight AR that I got from this website- Baby Guvnuh and I started really small and worked my way up till I had reliable function with the weakest loads I expected to use, which on an 11.5" with lightweight parts internally worked out to .070. Although I read a 1968 US Army report which recommended 0.068 with carbine buffer and M16 carrier. That's the long way of saying that even good research won't really tell you what gas port size you will really need and it really makes huge changes in recoil. If size or cost is an issue, go with the one I suggested. Otherwise start shopping, I promise you want one. |
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Practically identical barrels (Kriegers, Bartleins, etc) in the same configuration (caliber/length/weight) can take different gas ports to work.
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I am trying the .936 slr adjustable block on mine. I hope it works as well as some folks have reported.
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Practically identical barrels (Kriegers, Bartleins, etc) in the same configuration (caliber/length/weight) can take different gas ports to work. View Quote This is true. When I built my lightweight I also built a clone for a friend who just wanted whatever I was building. His is .077" gas port in order to function correctly with everything else being exactly the same. |
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Set screw or clamp? Can anyone tell me the advantages of one vs. the other? Is it hard to dimple the barrel yourself for screw set gas blocks? Thanks View Quote View All Quotes View All Quotes Quoted:
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I am trying the .936 slr adjustable block on mine. I hope it works as well as some folks have reported. Set screw or clamp? Can anyone tell me the advantages of one vs. the other? Is it hard to dimple the barrel yourself for screw set gas blocks? Thanks I strongly reccomend clamp on gas blocks, for a variety of reasons. I absolutely wouldn't use one of those jigs that just jams a pointed screw into the barrel. |
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I strongly reccomend clamp on gas blocks, for a variety of reasons. I absolutely wouldn't use one of those jigs that just jams a pointed screw into the barrel. View Quote View All Quotes View All Quotes Quoted:
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I am trying the .936 slr adjustable block on mine. I hope it works as well as some folks have reported. Set screw or clamp? Can anyone tell me the advantages of one vs. the other? Is it hard to dimple the barrel yourself for screw set gas blocks? Thanks I strongly reccomend clamp on gas blocks, for a variety of reasons. I absolutely wouldn't use one of those jigs that just jams a pointed screw into the barrel. Thanks for the reply. |
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Just got my maten ambi set! I have a question regarding the threads on the upper for the barrel nut. Is it normal for the threads to be "scalloped" (best way I can describe it) in front of the dust cover rod / pin? I'm guessing that it's normal in order to make installation and removal of the dust cover rod easier, but wasn't sure. Here are some pictures to show what I'm talking about. <a href="http://s165.photobucket.com/user/scubasteve1942/media/20140709_122531_zps4umyw2sr.jpg.html" target="_blank">http://i165.photobucket.com/albums/u65/scubasteve1942/20140709_122531_zps4umyw2sr.jpg</a> <a href="http://s165.photobucket.com/user/scubasteve1942/media/20140709_122514_zpsm9ykdu3c.jpg.html" target="_blank">http://i165.photobucket.com/albums/u65/scubasteve1942/20140709_122514_zpsm9ykdu3c.jpg</a> <a href="http://s165.photobucket.com/user/scubasteve1942/media/20140709_122431_zpsy6inuf6x.jpg.html" target="_blank">http://i165.photobucket.com/albums/u65/scubasteve1942/20140709_122431_zpsy6inuf6x.jpg</a> View Quote OMG! Look at that chatter around the pivot pin boss! |
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OMG! Look at that chatter around the pivot pin boss! View Quote View All Quotes View All Quotes Quoted:
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Just got my maten ambi set! I have a question regarding the threads on the upper for the barrel nut. Is it normal for the threads to be "scalloped" (best way I can describe it) in front of the dust cover rod / pin? I'm guessing that it's normal in order to make installation and removal of the dust cover rod easier, but wasn't sure. Here are some pictures to show what I'm talking about. <a href="http://s165.photobucket.com/user/scubasteve1942/media/20140709_122531_zps4umyw2sr.jpg.html" target="_blank">http://i165.photobucket.com/albums/u65/scubasteve1942/20140709_122531_zps4umyw2sr.jpg</a> <a href="http://s165.photobucket.com/user/scubasteve1942/media/20140709_122514_zpsm9ykdu3c.jpg.html" target="_blank">http://i165.photobucket.com/albums/u65/scubasteve1942/20140709_122514_zpsm9ykdu3c.jpg</a> <a href="http://s165.photobucket.com/user/scubasteve1942/media/20140709_122431_zpsy6inuf6x.jpg.html" target="_blank">http://i165.photobucket.com/albums/u65/scubasteve1942/20140709_122431_zpsy6inuf6x.jpg</a> OMG! Look at that chatter around the pivot pin boss! I'm not sure if you're being serious (if you aren't )..... My camera did a really good job picking up the "chatter" you mentioned but it's really hard to see in person unless you are looking for it. I'm not concerned over petty cosmetic stuff because this rifle is going to get used. The only reason I brought up the threads was in case it was going to have a impact on function of the barrel nut. |
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Well I sent out an email to Jason at mega including these pics. Within 10 min I had a reply! Everything is g2g.
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I'm not sure if you're being serious (if you aren't )..... My camera did a really good job picking up the "chatter" you mentioned but it's really hard to see in person unless you are looking for it. I'm not concerned over petty cosmetic stuff because this rifle is going to get used. The only reason I brought up the threads was in case it was going to have a impact on function of the barrel nut. View Quote View All Quotes View All Quotes Quoted:
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Just got my maten ambi set! I have a question regarding the threads on the upper for the barrel nut. Is it normal for the threads to be "scalloped" (best way I can describe it) in front of the dust cover rod / pin? I'm guessing that it's normal in order to make installation and removal of the dust cover rod easier, but wasn't sure. Here are some pictures to show what I'm talking about. <a href="http://s165.photobucket.com/user/scubasteve1942/media/20140709_122531_zps4umyw2sr.jpg.html" target="_blank">http://i165.photobucket.com/albums/u65/scubasteve1942/20140709_122531_zps4umyw2sr.jpg</a> <a href="http://s165.photobucket.com/user/scubasteve1942/media/20140709_122514_zpsm9ykdu3c.jpg.html" target="_blank">http://i165.photobucket.com/albums/u65/scubasteve1942/20140709_122514_zpsm9ykdu3c.jpg</a> <a href="http://s165.photobucket.com/user/scubasteve1942/media/20140709_122431_zpsy6inuf6x.jpg.html" target="_blank">http://i165.photobucket.com/albums/u65/scubasteve1942/20140709_122431_zpsy6inuf6x.jpg</a> OMG! Look at that chatter around the pivot pin boss! I'm not sure if you're being serious (if you aren't )..... My camera did a really good job picking up the "chatter" you mentioned but it's really hard to see in person unless you are looking for it. I'm not concerned over petty cosmetic stuff because this rifle is going to get used. The only reason I brought up the threads was in case it was going to have a impact on function of the barrel nut. no way will that impede the barrel nut ETA: i read slow and since near the top, we need a pic |
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If anyone is having or experienced sporatic ejection issues with DPMS extractors, JP has your fix. I went through 3 DPMS extractors in my JP bolt trying to fix stovepipes and weak ejection with Hornady and Winchester cases. JP's new enhanced extractor fixed all those issues. Now the rifle runs like a sewing machine with all types of brass in a nice neat pile.
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I'm glad I just bit the bullet and put JP parts in my rifle right out the gate.
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I had a complete JP bolt but it was from when they used DPMS extractors. Their new one is much nicer and has correct spring tension.
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Quoted: If anyone is having or experienced sporatic ejection issues with DPMS extractors, JP has your fix. I went through 3 DPMS extractors in my JP bolt trying to fix stovepipes and weak ejection with Hornady and Winchester cases. JP's new enhanced extractor fixed all those issues. Now the rifle runs like a sewing machine with all types of brass in a nice neat pile. View Quote My JP bolt definitely pitches brass in the same area VERY nicely. |
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nice
I just added a raptor handle, much better than the factory mega, BAD selector is somewhere between here and Las Vegas, and then just a norgon mag release and she will be good to go, then just more food |
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Well, this is my first post! So I would like to thank everyone who has contributed in a beneficial way to this thread. I have only made it through 38 pages of the 76 at this time and can't take it any more. I have started my Mega MATEN MKM build. In doing so, I found what I think is a great price on DPMS BCG at Midway USA. I paid $168.11 for the DPMS BCG!
I hope I can help someone out as many of you have unknowingly helped me. |
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Anyone ever have trouble with the safety detent not fitting? I am using the CMMG LPK and I'm not sure whether the detent or the hole is out of spec. I'm going to order a couple and see what happens.
The pin will only go partially in the hole, not enough to engage the selector so it's not doing shit. I gave it a few love taps and it forced its way down a little more but then I pulled it out not wanting to screw anything up and before I couldn't get it back out. |
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Anyone ever have trouble with the safety detent not fitting? I am using the CMMG LPK and I'm not sure whether the detent or the hole is out of spec. I'm going to order a couple and see what happens. The pin will only go partially in the hole, not enough to engage the selector so it's not doing shit. I gave it a few love taps and it forced its way down a little more but then I pulled it out not wanting to screw anything up and before I couldn't get it back out. View Quote Do you have some mics to measure the detent? |
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Armedferret...can you give a little more info on what size and type of tools/drill/reamer you use to pin the block on your barrels, as well as if you pin it with a taper or non-tapered pin ?
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Armedferret...can you give a little more info on what size and type of tools/drill/reamer you use to pin the block on your barrels, as well as if you pin it with a taper or non-tapered pin ? View Quote Read this page |
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Thanks, that answers what you use to secure the block for working on it but what size drill/taper pin did you use.
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Thanks, that answers what you use to secure the block for working on it but what size drill/taper pin did you use. View Quote I suggest reading the page I linked. Those questions were asked once, and answered with information found in the link. Asking them again won't change the answer. |
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Thought I was gonna have to read through 76 pages, which you know I would be to lazy to do cuz I didn't even read the paragraph in the link you supplied...went back and actually read the link info...thanks..
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Thought I was gonna have to read through 76 pages, which you know I would be to lazy to do cuz I didn't even read the paragraph in the link you supplied...went back and actually read the link info...thanks.. View Quote No worries. And thanks for not running around screaming I was a jerk. I like to help people learn where to find answers, instead of just give it to 'em. (for the future, in case the link goes awry, it's the Rainier gas block pinning tool/jig, which uses a #21 drill and then I hand-ream with a 2/0 taper reamer. McMaster and ebay both are great places to find the drill, reamer, and pins.) |
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I'd be lyin if I said the thought didn't cross my mind ...still, much appreciate the additional info. I am planning on trying to drill and pin one in the near future and will probably use a drill press for the initial hole but seeing the pic you posted showing the taper reamer with the T handle, I figured you did at least the final step by hand. Seeing as it'll be my first attempt, I'll probably try doing the whole process with the drill press...or if I can convince my neighbor, with his milling setup. Thanks again.
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Quoted: Anyone ever have trouble with the safety detent not fitting? I am using the CMMG LPK and I'm not sure whether the detent or the hole is out of spec. I'm going to order a couple and see what happens. The pin will only go partially in the hole, not enough to engage the selector so it's not doing shit. I gave it a few love taps and it forced its way down a little more but then I pulled it out not wanting to screw anything up and before I couldn't get it back out. View Quote Ya know....I've been thinking about this for a couple of hours and it seems to me that I had this same problem....I think that I ended up using a different detent from some small parts kits I had. The CMMG unit is a bit large....I think you could dress down the larger part of the bottom of the detent by chucking it in a drill head and taking a couple thousandths off of the diameter with a fine file. |
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I was able to get it in. I ended up sanding down the pin. I ordered a couple DPMS pins anyway.
The pin was .140in not sure what size it is supposed to be. |
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Since I already have an 18" MKM build, I'm thinking about making a "pistol" with the sigtac brace.
I'm thinking rifle length MKM and a 12" barrel? Anyone know who has one? |
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In the link for the Rainier Arms Taper pin gas block tool, it recommends a #31 drill and in your post you say you used the #21 drill and a 2/0 taper pin reamer...was that a typo? Which would or should be used...the #21 drill or the #31 drill?
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In the link for the Rainier Arms Taper pin gas block tool, it recommends a #31 drill and in your post you say you used the #21 drill and a 2/0 taper pin reamer...was that a typo? Which would or should be used...the #21 drill or the #31 drill? View Quote typo sorry. VA's rockin new meds for my back. I don't think I like 'em. |
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