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Posted: 4/10/2014 5:44:28 AM EDT
Got my CMMG 4.5" yesterday. Now I need to figure out which handguards to get. It sticks out rougly 3.3 inches from the receiver.
Here it is with my 10.5" LMT upper. 
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Posted: 4/10/2014 5:46:37 AM EDT
[#1]
Quoted:
Got my CMMG 4.5" yesterday. Now I need to figure out which handguards to get. It sticks out rougly 3.3 inches from the receiver. Here it is with my 10.5" LMT upper. http://i68.photobucket.com/albums/i24/telsonman/20140409_182701_zpsd0006303.jpg silence it and use the same handguard as the top upper? |
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Posted: 4/10/2014 6:12:00 AM EDT
[#2]
Here is my 4.5" 9mm SBR for inspiration.
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Posted: 4/10/2014 6:36:43 AM EDT
[#3]
Quoted:
Got my CMMG 4.5" yesterday. Now I need to figure out which handguards to get. It sticks out rougly 3.3 inches from the receiver. Here it is with my 10.5" LMT upper. http://i68.photobucket.com/albums/i24/telsonman/20140409_182701_zpsd0006303.jpg It looks cold
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Posted: 4/10/2014 6:36:48 AM EDT
[#4]
Quote HistoryQuoted:
silence it and use the same handguard as the top upper? Quote HistoryQuoted:
Quoted:
Got my CMMG 4.5" yesterday. Now I need to figure out which handguards to get. It sticks out rougly 3.3 inches from the receiver. Here it is with my 10.5" LMT upper. http://i68.photobucket.com/albums/i24/telsonman/20140409_182701_zpsd0006303.jpg silence it and use the same handguard as the top upper? No, I'm waiting on my LGS to get some spectre II's in stock. So I have to find something to do in the meantime. |
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Posted: 4/10/2014 6:43:54 AM EDT
[#5]
Quote HistoryQuoted:
No, I'm waiting on my LGS to get some spectre II's in stock. So I have to find something to do in the meantime. Quote HistoryQuoted:
Quoted:
Quoted:
Got my CMMG 4.5" yesterday. Now I need to figure out which handguards to get. It sticks out rougly 3.3 inches from the receiver. Here it is with my 10.5" LMT upper. http://i68.photobucket.com/albums/i24/telsonman/20140409_182701_zpsd0006303.jpg silence it and use the same handguard as the top upper? No, I'm waiting on my LGS to get some spectre II's in stock. So I have to find something to do in the meantime. put a fake on it. look here or here |
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Posted: 4/10/2014 6:47:21 AM EDT
[#6]
How does that cycle?
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Posted: 4/10/2014 10:05:20 AM EDT
[#7]
Quote HistoryQuoted:
It looks cold Quote HistoryQuoted:
Quoted:
Got my CMMG 4.5" yesterday. Now I need to figure out which handguards to get. It sticks out rougly 3.3 inches from the receiver. Here it is with my 10.5" LMT upper. http://i68.photobucket.com/albums/i24/telsonman/20140409_182701_zpsd0006303.jpg It looks cold I WAS IN THE POOL!! |
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Posted: 4/10/2014 10:45:08 AM EDT
[#8]
Quoted:
Got my CMMG 4.5" yesterday. Now I need to figure out which handguards to get. It sticks out rougly 3.3 inches from the receiver. Here it is with my 10.5" LMT upper. http://i68.photobucket.com/albums/i24/telsonman/20140409_182701_zpsd0006303.jpg As pictured - looks like something out of the "Men in Black" armory. 
Have fun! YMMV |
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Posted: 4/10/2014 10:59:38 AM EDT
[#9]
Quote HistoryQuoted:
I WAS IN THE POOL!! Quote HistoryQuoted:
Quoted:
Quoted:
Got my CMMG 4.5" yesterday. Now I need to figure out which handguards to get. It sticks out rougly 3.3 inches from the receiver. Here it is with my 10.5" LMT upper. http://i68.photobucket.com/albums/i24/telsonman/20140409_182701_zpsd0006303.jpg It looks cold I WAS IN THE POOL!! THERE WAS SHRINKAGE!!!!! Actually, gotta say thanks to the OP. I have a 9mm barrel I'm planning to have cut down, but no silencers in this state, so I wanted to have basically just the muzzle flash sticking out from the end of a 4in pistol quad rail. so it looks like I'll need about a 5.5in barrel to be how I want. This is about the look I'm going for : 
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Posted: 4/10/2014 3:43:26 PM EDT
[#10]
Remember, the .22 barrel has more of the barrel inside of the receiver. Just so you keep that in mind when figuring length.
I just built a 9mm to match a 5.56 and that was slightly different too. Does that make any sense 
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Posted: 4/10/2014 4:53:32 PM EDT
[#11]
Quote HistoryQuoted:
Remember, the .22 barrel has more of the barrel inside of the receiver. Just so you keep that in mind when figuring length. I just built a 9mm to match a 5.56 and that was slightly different too. Does that make any sense Yes - makes sense and good thing to point out. YMMV |
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Posted: 4/14/2014 12:37:25 PM EDT
[#12]
Dedicated 6" AR in .22lr on top.
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Posted: 4/14/2014 12:52:04 PM EDT
[#13]
Here's my lil .22 SBR
P.S. The comp is needed for the vicious .22 recoil and blast 
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Posted: 4/14/2014 8:55:04 PM EDT
[#14]
Quote HistoryQuoted:
Here's my lil .22 SBR http://www.hunt101.com/data/500/medium/BM22-3.jpg P.S. The comp is needed for the vicious .22 recoil and blast I'd probably grab the comp and blow off my fingers. Once blew the sideplate/cover off an AR-7 with my hand wrapped around the mag well. Hand hurt like heck for almost a week. Turned funny colors too. Say - is that a polymer lower? Are the pin holes holding up? YMMV |
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Posted: 4/14/2014 8:56:46 PM EDT
[#15]
AR-15 SBR with dedicated .22LR upper using a Taccom 4" barrel and Sparrow suppressor.
 Closeup pic where you can see where the barrel ends.  You can't tell in the pics but there is a 1/2x28 to Sparrow 1/2x28 adapter in between the Taccom barrel and the Sparrow. |
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Posted: 4/15/2014 5:29:43 AM EDT
[#16]
How much length does that adapter add?
Also, have you ever had an issue with the base of the suppressor sticking to the barrel threads? |
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Posted: 4/15/2014 5:46:56 AM EDT
[#17]
Looks like it has been swimming in a cold pool
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Posted: 4/15/2014 5:47:22 AM EDT
[#18]
Quote HistoryQuoted: How much length does that adapter add? Also, have you ever had an issue with the base of the suppressor sticking to the barrel threads? Below is a pic I found on the net of the adapter.  |
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Posted: 4/15/2014 7:06:05 AM EDT
[#19]
I mean do you ever have the problem of not being able to get the suppressor off of the barrel, since its under those handguards. I've read about instances where the tube separates from the endcap.
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Posted: 4/15/2014 7:33:34 AM EDT
[#20]
Quote HistoryQuoted: I mean do you ever have the problem of not being able to get the suppressor off of the barrel, since its under those handguards. I've read about instances where the tube separates from the endcap. There is plenty of tube to grab on to and I've had no problems unscrewing the suppressor from the adapter. Keep in mind that since the Sparrow has an O ring to prevent gases from going back into the threads to make them seize up. |
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Posted: 4/15/2014 9:47:10 AM EDT
[#21]
Here is a video of my dedicated .22lr upper with 4" barrel being shot in full auto using a RR M-16 lower.
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Posted: 4/15/2014 2:04:00 PM EDT
[#22]
4.5" barrel.
YHM handguard and cap. 
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Posted: 4/15/2014 2:24:58 PM EDT
[#23]
Quote HistoryQuoted:
I'd probably grab the comp and blow off my fingers. Once blew the sideplate/cover off an AR-7 with my hand wrapped around the mag well. Hand hurt like heck for almost a week. Turned funny colors too. Say - is that a polymer lower? Are the pin holes holding up? YMMV Quote HistoryQuoted:
Quoted:
Here's my lil .22 SBR http://www.hunt101.com/data/500/medium/BM22-3.jpg P.S. The comp is needed for the vicious .22 recoil and blast I'd probably grab the comp and blow off my fingers. Once blew the sideplate/cover off an AR-7 with my hand wrapped around the mag well. Hand hurt like heck for almost a week. Turned funny colors too. Say - is that a polymer lower? Are the pin holes holding up? YMMV No problems at all with the FCG pin holes. It started life as a Bushmaster Pistol......added stock after Stamp came back. It switches from configuration to configuration. It's other configuration is a standard Magpul stock and a 7.5" 5.56 upper. |
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Posted: 4/15/2014 4:46:37 PM EDT
[#24]
Quote HistoryQuoted:
Quoted:
Quoted:
Quoted:
Got my CMMG 4.5" yesterday. Now I need to figure out which handguards to get. It sticks out rougly 3.3 inches from the receiver. Here it is with my 10.5" LMT upper. http://i68.photobucket.com/albums/i24/telsonman/20140409_182701_zpsd0006303.jpg silence it and use the same handguard as the top upper? No, I'm waiting on my LGS to get some spectre II's in stock. So I have to find something to do in the meantime. put a fake on it. look here or here I have a spikes fake can on mine: 
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Posted: 4/15/2014 7:20:51 PM EDT
[#25]
I'm curious as to the reason for the adapter. The threads are already 1/2x28 right?
I ask because I've got a sparrow in jail and a pending form 1 so I can install the 4.5" cmmg barrel. |
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Posted: 4/16/2014 8:22:35 AM EDT
[#26]
Quote HistoryQuoted: I'm curious as to the reason for the adapter. The threads are already 1/2x28 right? I ask because I've got a sparrow in jail and a pending form 1 so I can install the 4.5" cmmg barrel. The Taccom 4" barrel has threads that go to the tip of the muzzle. The Sparrow uses "Sparrow threads" which have a space at the muzzle end for an internal O ring to prevent unscrewing and gases from going back into the threads. The point of the adapter is to convert regular 1/2 x28 to sparrow 1/2x28. See the pic below (shamelessly borrowed) which shows barrels with both types of threads. I think the CMMG barrel you bought has the Sparrow threads so you wouldn't need the adapter.  |
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Posted: 4/16/2014 8:43:50 AM EDT
[#27]
correct. CMMG threads are sparrow/spectre threads
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Posted: 4/16/2014 9:03:23 AM EDT
[#28]
No gas block or tube? Can anyone explain how the gas system works with a barrel that small?
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Posted: 4/16/2014 9:54:57 AM EDT
[#29]
Quote HistoryQuoted: No gas block or tube? Can anyone explain how the gas system works with a barrel that small? It is a .22LR which is does not have a gas system because it is blowback.
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Posted: 4/16/2014 10:25:27 AM EDT
[#30]
Quote HistoryQuoted:
Here is my 4.5" 9mm SBR for inspiration.
http://i1272.photobucket.com/albums/y396/GreenGoose/DSC00479_zps6c662d58.jpg I keep trying myself from starting another project with my second lower and trying to leave it be to not spend the money.... and you fuckers aren't helping on damn bit. 
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Posted: 4/16/2014 10:47:01 AM EDT
[#31]
I love mine. |
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Posted: 4/16/2014 12:43:08 PM EDT
[#32]
Quote HistoryQuoted:
I keep trying myself from starting another project with my second lower and trying to leave it be to not spend the money.... and you fuckers aren't helping on damn bit. Quote HistoryQuoted:
Quoted:
Here is my 4.5" 9mm SBR for inspiration.
http://i1272.photobucket.com/albums/y396/GreenGoose/DSC00479_zps6c662d58.jpg I keep trying myself from starting another project with my second lower and trying to leave it be to not spend the money.... and you fuckers aren't helping on damn bit. I had a set up just like this. Same YHM rail. I loved it. When eForms started and worked I filed a From 1 on it. I got the Form 1 back so it has a stock now but I am leaning toward building another 4" upper to make this set up again. It was fun. MAHA |
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Posted: 4/16/2014 2:23:40 PM EDT
[#33]
I run a 7" BAR rail on my 4.5" CMMG barrel and a 5.5" flash hider until I get a suppressor.
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Posted: 4/16/2014 2:33:53 PM EDT
[#34]
Quote HistoryQuoted:
It is a .22LR which is does not have a gas system because it is blowback. Quote HistoryQuoted:
Quoted:
No gas block or tube? Can anyone explain how the gas system works with a barrel that small? It is a .22LR which is does not have a gas system because it is blowback. Thanks! I didn't know that dedicated uppers are that way. |
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Posted: 4/16/2014 3:59:32 PM EDT
[#35]
Quote HistoryQuoted:
The Taccom 4" barrel has threads that go to the tip of the muzzle. The Sparrow uses "Sparrow threads" which have a space at the muzzle end for an internal O ring to prevent unscrewing and gases from going back into the threads. The point of the adapter is to convert regular 1/2 x28 to sparrow 1/2x28. See the pic below (shamelessly borrowed) which shows barrels with both types of threads. I think the CMMG barrel you bought has the Sparrow threads so you wouldn't need the adapter. Quote HistoryQuoted:
Quoted:
I'm curious as to the reason for the adapter. The threads are already 1/2x28 right? I ask because I've got a sparrow in jail and a pending form 1 so I can install the 4.5" cmmg barrel. The Taccom 4" barrel has threads that go to the tip of the muzzle. The Sparrow uses "Sparrow threads" which have a space at the muzzle end for an internal O ring to prevent unscrewing and gases from going back into the threads. The point of the adapter is to convert regular 1/2 x28 to sparrow 1/2x28. See the pic below (shamelessly borrowed) which shows barrels with both types of threads. I think the CMMG barrel you bought has the Sparrow threads so you wouldn't need the adapter. Thanks for the explanation. Not to side track this thread but I have a tactical solutions x-ring barrel on my 10/22 and it looks like the threads go all the way to the end so should I get one of these adapters if I want to put my sparrow on it? Thanks again. |
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Posted: 4/16/2014 5:11:18 PM EDT
[#36]
Quote HistoryQuoted:
The point of the adapter is to convert regular 1/2 x28 to sparrow 1/2x28. See the pic below (shamelessly borrowed) which shows barrels with both types of threads. I think the CMMG barrel you bought has the Sparrow threads so you wouldn't need the adapter.
Is the top barrel from CMMG? If so, what is the thread/flatspot length from the shoulder of the CMMG barrel? |
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Posted: 4/16/2014 7:18:54 PM EDT
[#37]
Quote HistoryQuoted: Thanks! I didn't know that dedicated uppers are that way. Quote HistoryQuoted: Quoted: Quoted: No gas block or tube? Can anyone explain how the gas system works with a barrel that small? It is a .22LR which is does not have a gas system because it is blowback. Thanks! I didn't know that dedicated uppers are that way. All .22LR in an AR-15 is blowback. It doesn't matter if it is a dedicated upper or a drop in .223 conversion bolt. The only difference between the two is the conversion bolt has the subcaliber insert on the front while the bolt for the dedicated upper has a collar instead. Note: You can take the insert off a CMMG bolt and swap it with a collar. |
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Posted: 4/16/2014 7:22:04 PM EDT
[#38]
Quote HistoryQuoted: Thanks for the explanation. Not to side track this thread but I have a tactical solutions x-ring barrel on my 10/22 and it looks like the threads go all the way to the end so should I get one of these adapters if I want to put my sparrow on it? Thanks again. Quote HistoryQuoted: Quoted: Quoted: I'm curious as to the reason for the adapter. The threads are already 1/2x28 right? I ask because I've got a sparrow in jail and a pending form 1 so I can install the 4.5" cmmg barrel. The Taccom 4" barrel has threads that go to the tip of the muzzle. The Sparrow uses "Sparrow threads" which have a space at the muzzle end for an internal O ring to prevent unscrewing and gases from going back into the threads. The point of the adapter is to convert regular 1/2 x28 to sparrow 1/2x28. See the pic below (shamelessly borrowed) which shows barrels with both types of threads. I think the CMMG barrel you bought has the Sparrow threads so you wouldn't need the adapter. Thanks for the explanation. Not to side track this thread but I have a tactical solutions x-ring barrel on my 10/22 and it looks like the threads go all the way to the end so should I get one of these adapters if I want to put my sparrow on it? Thanks again. While you don't have to get the adapter, what will happen if you don't have one, is that your O ring will get chewed up by the threads with continued installation / removal and gas will get back into the threads. I elected to get one of the adapters to avoid those problems. I just looked at my receipt and with shipping, I paid $33.53 for it.
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Posted: 4/16/2014 7:24:20 PM EDT
[#39]
You can buy a shit load of 1/2 o rings for 33.50ish
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Posted: 4/16/2014 7:25:53 PM EDT
[#40]
Quote HistoryQuoted: Is the top barrel from CMMG? If so, what is the thread/flatspot length from the shoulder of the CMMG barrel? Quote HistoryQuoted: Quoted: The point of the adapter is to convert regular 1/2 x28 to sparrow 1/2x28. See the pic below (shamelessly borrowed) which shows barrels with both types of threads. I think the CMMG barrel you bought has the Sparrow threads so you wouldn't need the adapter. http://i1335.photobucket.com/albums/w676/8afuzzball/barrels_zps37b191f1.jpg Is the top barrel from CMMG? If so, what is the thread/flatspot length from the shoulder of the CMMG barrel? The top barrel is not from CMMG, just one I found a picture of to illustrate the difference in the threads. Here are the specs.  |
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Posted: 4/16/2014 7:27:36 PM EDT
[#41]
Quote HistoryQuoted:
While you don't have to get the adapter, what will happen if you don't have one, is that your O ring will get chewed up by the threads with continued installation / removal and gas will get back into the threads. I elected to get one of the adapters to avoid those problems. I just looked at my receipt and with shipping, I paid $33.53 for it. That is a better price than the silencerco website, did you get that online? |
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Posted: 4/16/2014 7:32:41 PM EDT
[#42]
Quote HistoryQuoted: You can buy a shit load of 1/2 o rings for 33.50ish I agree about the price difference between the adapter and the O rings as I picked up some spare O rings from the Silencer Shop for $5. Note: that inner O ring looks like it will be a bitch to change. However, in addition to O ring damage, I had other reasons, notably my original calculations prior to receiving all the parts put the end of the Sparrow right at the end of my hand guard and the adapter was a good way to extend the length so I could have enough of the suppressor sticking out to unscrew. The other reason was that I was concerned that the suppressor would loosen up without proper O ring engagement. As you can see in the pic, I ended up with more of the Sparrow sticking out that I expected. That was due in part to the hand rail being shorter that what the web site said and that the Sparrow was longer than the measurements I found on the web.
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Posted: 4/16/2014 7:34:46 PM EDT
[#43]
Quote HistoryQuoted: That is a better price than the silencerco website, did you get that online? Quote HistoryQuoted: Quoted: While you don't have to get the adapter, what will happen if you don't have one, is that your O ring will get chewed up by the threads with continued installation / removal and gas will get back into the threads. I elected to get one of the adapters to avoid those problems. I just looked at my receipt and with shipping, I paid $33.53 for it. That is a better price than the silencerco website, did you get that online? I got it from BudsGunShop.Com for $23.53 plus $10 shipping.
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Posted: 4/16/2014 7:35:47 PM EDT
[#44]
Quote HistoryQuoted:
I agree about the price difference between the adapter and the O rings as I picked up some spare O rings from the Silencer Shop for $5. Note: that inner O ring looks like it will be a bitch to change. However, in addition to O ring damage, I had other reasons, notably my original calculations prior to receiving all the parts put the end of the Sparrow right at the end of my hand guard and the adapter was a good way to extend the length so I could have enough of the suppressor sticking out to unscrew. The other reason was that I was concerned that the suppressor would loosen up without proper O ring engagement. As you can see in the pic, I ended up with more of the Sparrow sticking out that I expected. That was due in part to the hand rail being shorter that what the web site said and that the Sparrow was longer than the measurements I found on the web. Quote HistoryQuoted:
Quoted:
You can buy a shit load of 1/2 o rings for 33.50ish I agree about the price difference between the adapter and the O rings as I picked up some spare O rings from the Silencer Shop for $5. Note: that inner O ring looks like it will be a bitch to change. However, in addition to O ring damage, I had other reasons, notably my original calculations prior to receiving all the parts put the end of the Sparrow right at the end of my hand guard and the adapter was a good way to extend the length so I could have enough of the suppressor sticking out to unscrew. The other reason was that I was concerned that the suppressor would loosen up without proper O ring engagement. As you can see in the pic, I ended up with more of the Sparrow sticking out that I expected. That was due in part to the hand rail being shorter that what the web site said and that the Sparrow was longer than the measurements I found on the web. I do inside o rings on pressure connectors all the time, get a small dental pick, push one side down to the groove then work both ways. it'll go quick after a little practice. |
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Posted: 4/16/2014 7:41:11 PM EDT
[#45]
Here is a video of my suppressed SBR .22lr upper in full auto on a RR M-16 lower.
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Posted: 4/17/2014 4:09:02 AM EDT
[#46]
I've had a Sparrow supressor for a few years now. It's used on several short barreled (4.5") hosts and still has the original o-ring.
I would classify the use it gets as moderate to heavy. None of the hosts have special threading. No problems with suppressor loosening or becoming difficult to remove. |
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Posted: 4/24/2014 12:55:27 AM EDT
[#47]
Here's my little blaster, the barrel needs to be cut down to 4" and maybe a new hand guard, this little one is fun
http://i1333.photobucket.com/albums/w625/zavalaoscarl/Guns/IMG_3591-Copy_zps01453da7.jpg |
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Posted: 4/24/2014 3:04:52 PM EDT
[#48]
Quote HistoryQuoted: Here's my little blaster, the barrel needs to be cut down to 4" and maybe a new hand guard, this little one is fun http://i1333.photobucket.com/albums/w625/zavalaoscarl/Guns/IMG_3591-Copy_zps01453da7.jpg Kinda looks like Han Solo's gun  |
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Posted: 4/24/2014 4:24:35 PM EDT
[#49]
Quote HistoryQuoted:
Kinda looks like Han Solo's gun http://i1335.photobucket.com/albums/w676/8afuzzball/HanSolo_zpsb1ebf747.png Quote HistoryQuoted:
Quoted:
Here's my little blaster, the barrel needs to be cut down to 4" and maybe a new hand guard, this little one is fun http://i1333.photobucket.com/albums/w625/zavalaoscarl/Guns/IMG_3591-Copy_zps01453da7.jpg Kinda looks like Han Solo's gun http://i1335.photobucket.com/albums/w676/8afuzzball/HanSolo_zpsb1ebf747.png LOL! Would be a good prop - a "modernized" blaster. The C96 was 80+ years old when the original Star Wars was made. It's about 118 years old now. The AR design is only about 57 years old....
YMMV |
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Posted: 4/29/2014 4:47:13 PM EDT
[#50]
This thread is right up my ally. I'm looking at building/buying a .22lr 4.5" upper.
Is there a write-up on assembling a dedicated pistol/SBR .22lr upper? A part list? Best barrel to go with, and why? I'm looking to build it on a budget, so any budget conscious advice would be much appreciated. I'm going to be putting my Octane 45HD on it until my Spectre II gets out of ATF jail. I normally just assemble the lower and buy a complete upper, so this would be my first upper. |
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