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Posted: 7/11/2014 4:54:42 AM EDT
Hello,
New guy here. I am one of those AKM guys that just has to build a AR....just once. LOL I am looking for a good authentic looking moderator for a Colt Model 629/XM177E2 clone build with grenade ring. I however am going to get a 14.5 inch barrel and would like the moderator to slip on to extend it to legal length, so the barrel is longer. Has anyone been down this road before? I hope so. I cannot find anything. Thanks S |
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Sorry about the crappy pictures. I just took them for this post with my cell phone.
This moderator is a "Slip On" style. that as you can see goes over the barrel and only extends just under two inches. To make the barrel legal length. I liked this idea because I get to keep a barrel that is longer. However, after doing some research. I realize this moderator is not correct or authentic for what I want to do. So I am now seeking a moderator that will function like this one...........letting me keep my longer barrel but giving me a more authentic looking compensator for my Colt Model 629/XM177E2 clone build. Hope this makes sense to everyone that reads this. I have no idea where this moderator came from?? I guess someone might have made it themselves?? Does anyone recognize it from anywhere? Thanks for any help or advice. S |
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so in your last post, you pointed out the things i was about to point out.
that even with a slip on, if you don't permanently attach it, your 14.5" barrel still won't be legal so you're not really saving yourself any work. the flash hider you have looks to be blued and the slots aren't correct. depending on your budget and how accurate you want it to look, here's your options on a carbine barrel get a 16" barrel and thread on whatever one you want. Brick's moderators are really popular and really close to the originals. get a shorter barrel or have the 14.5" barrel cut down and permanently attach a moderator to bring it to legal length. this looks the most correct but is the more expensive option as you'll have the barrel cutting/threading/permanently attaching the flash hider. |
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[b]that even with a slip on, if you don't permanently attach it, your 14.5" barrel still won't be legal so you're not really saving yourself any work.. View Quote View All Quotes View All Quotes [b]that even with a slip on, if you don't permanently attach it, your 14.5" barrel still won't be legal so you're not really saving yourself any work.. Oh yea, I was planning on getting it perm attached in which ever manner is legal. I also was going to be looking for someone to do that for as well. [b]the flash hider you have looks to be blued and the slots aren't correct.. Yea, I have found out, its not correct for anything. Nothing I am aware of. So I am looking for a new one. [b]get a shorter barrel or have the 14.5" barrel cut down and permanently attach a moderator to bring it to legal length. this looks the most correct but is the more expensive option as you'll have the barrel cutting/threading/permanently attaching the flash hider. I guess this is what I will be doing. I was really hoping to keep the longer barrel by finding another "slip on" style moderator that was of the correct style with the grenade ring.............but unless someone knows of one........it wont be an option. Oh, I should also point out that I donot have a lower receiver yet either. I plan on getting one ordered from Nodak. The one with the fence for this clone. How do I get in touch with Brick to discuss the purchase of the moderator? Thanks S |
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brick has them for sale on GB:
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=428302206 http://www.gunbroker.com/Auction/ViewItem.aspx?Item=428302632 you can also contact him via email here: http://www.ar15.com/member/mail.html?id=603 |
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brick has them for sale on GB: http://www.gunbroker.com/Auction/ViewItem.aspx?Item=428302206 http://www.gunbroker.com/Auction/ViewItem.aspx?Item=428302632 you can also contact him via email here: http://www.ar15.com/member/mail.html?id=603 View Quote Awesome! Thanks for the information and help. |
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http://www.ar15.com/forums/t_3_123/650723_How_to_contact_a_member___I_am_looking_for_Brick_.html
I had replied to you in this thread^^^ http://www.ar15.com/member/member.html?id=603 Brick's profile page |
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FWIW that is a Bushmaster slip over - looks like a ltwt barrel model, which are kinda hard to find. Main issue as to looking real is no wrench flats and not a cone on the end. Not really a bad way to go, but yes, Brick's is more historically accurate. Sweet barrel, BTW. Sure you want to cut it? You might want to think about a 653 or 723 build instead.
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http://www.ar15.com/forums/t_3_123/650723_How_to_contact_a_member___I_am_looking_for_Brick_.html I had replied to you in this thread^^^ http://www.ar15.com/member/member.html?id=603 Brick's profile page View Quote Opps..........sorry I didnt see it. I did not get a notification that there had been more posts. I will have to get used to the forum settings over here. But, thank you very much for posting the information! This place has turned out to be very helpful. S |
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FWIW that is a Bushmaster slip over - looks like a ltwt barrel model, which are kinda hard to find. Main issue as to looking real is no wrench flats and not a cone on the end. Not really a bad way to go, but yes, Brick's is more historically accurate. Sweet barrel, BTW. Sure you want to cut it? You might want to think about a 653 or 723 build instead. View Quote No, I am not sure I want to cut it at all..........LOL........I might have to try and find a lightweight barrel to have cut. hmmmmm. Thanks for the information on the moderator. It does have wrench flats though.... if you look closer in the pictures. At least is does at the back end of the moderator. Thanks! S |
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is that an older Colt barrel?
Would be a shame to cut something like that if it is |
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i see C MP CHROME BORE on top. FSB isn't colt marked so it's one of the later ones but still would be a shame to cut. View Quote View All Quotes View All Quotes Quoted:
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is that an older Colt barrel? Would be a shame to cut something like that if it is i see C MP CHROME BORE on top. FSB isn't colt marked so it's one of the later ones but still would be a shame to cut. Yes, I believe it is. It is marked "C MP CHROME BORE" on top of the barrel. Its seems mint as well. Perhaps I should consider building a model 653.........or perhaps just try and pick up another barrel for the XM177E2 build? |
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Good idea. I love the looks of the CM 629/XM177...........but I dont think perm attaching an A1 birdcage flash hider to a 14.5 inch barrel would get me to legal 16 inches? S View Quote View All Quotes View All Quotes Quoted:
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You might want to think about a 653 or 723 build instead. Good idea. I love the looks of the CM 629/XM177...........but I dont think perm attaching an A1 birdcage flash hider to a 14.5 inch barrel would get me to legal 16 inches? S Check out CNCwarrior online. For $5 they make a spacer that looks like the rear of a USGI FH and is hardly noticable but once pinned with the FH it 's legal. Check out the 1st page of the KISS/IDF pic thread over in AR Discussions. Very first carbine was done that way (M4 barrel) and I'm about to have an A2 FH pinned on a SOCOM barrel like that. Personally I think ti looks better than the extended A1 or A2 FH, but that's also an option. At first glance you don't even notice the spacer...but that's my .02 |
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Check out CNCwarrior online. For $5 they make a spacer that looks like the rear of a USGI FH and is hardly noticable but once pinned with the FH it 's legal. Check out the 1st page of the KISS/IDF pic thread over in AR Discussions. Very first carbine was done that way (M4 barrel) and I'm about to have an A2 FH pinned on a SOCOM barrel like that. Personally I think ti looks better than the extended A1 or A2 FH, but that's also an option. At first glance you don't even notice the spacer...but that's my .02 View Quote View All Quotes View All Quotes Quoted:
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You might want to think about a 653 or 723 build instead. Good idea. I love the looks of the CM 629/XM177...........but I dont think perm attaching an A1 birdcage flash hider to a 14.5 inch barrel would get me to legal 16 inches? S Check out CNCwarrior online. For $5 they make a spacer that looks like the rear of a USGI FH and is hardly noticable but once pinned with the FH it 's legal. Check out the 1st page of the KISS/IDF pic thread over in AR Discussions. Very first carbine was done that way (M4 barrel) and I'm about to have an A2 FH pinned on a SOCOM barrel like that. Personally I think ti looks better than the extended A1 or A2 FH, but that's also an option. At first glance you don't even notice the spacer...but that's my .02 Your right. It really is not that noticeable at all...............perhaps I should go that route. To save destroying this barrel. I can prob use another barrel to have the Brick XM moderator attached...... I checked my spare parts box.......I have a A2 birdcage but no A1........darn. hmmmmm Dosnt always seem like one build leads to another build........and another..........lol |
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Check out J&T (button at bottom) for decent ltwt barrels that are begging to be cut down. They have a chrome-lining option for additional $50 and I have never heard anyone on this forum say anything but good things about their barrels. I would definitely not cut that Colt barrel. At this point in time they are pretty rare birds. Wish I hadn't sold the 3 I had.
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Check out J&T (button at bottom) for decent ltwt barrels that are begging to be cut down. They have a chrome-lining option for additional $50 and I have never heard anyone on this forum say anything but good things about their barrels. I would definitely not cut that Colt barrel. At this point in time they are pretty rare birds. Wish I hadn't sold the 3 I had. View Quote Thanks buddy. I will do that. Thanks so much for the advice and information. S |
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Question. I've always wanted to know what exactly is going on internally in the 4.5" moderator? Any baffles, etc? I've yet to see up into a real one.
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Foe an extremely accurate representation, Tony's moderator still has some inaccuracies - such as the lack of bevel on the grenade ring and the shape of the broaching cuts - look close and you'll see what I mean. I do agree with you that it looks a lot better than the 5.5 we all know and despise, and I found it interesting that it makes an 11.5" barrel legal length. My question is, if it's over 16" by 1/4", couldn't Brick just not countersink his moderator as much and accomplish the same thing? The bodies look about the same length. I would prefer a Brick's moderator not countersunk as much, with up to an 1/8" longer body to make it legal with an 11.5" barrel if that's all it took. I'm guessing it's not quite that simple, but it really doesn't look over long, like some of Kurt's 5.5" customs did to me. Like I said, it 'look's the right length. Maybe the answer is 1/8" here and 1/8" there...
Can you set them up side by side and compare OAL for us? ETA2: I notice the length of the wrench flat area on Tony's is longer also. Looks like this is the approach they took. Interesting. I still think Brick's is superior though. ETA3: I just noticed that's a BM moderator not Bricks. Reading is everything. Thought it was missing the cone... |
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Foe an extremely accurate representation, Tony's moderator still has some inaccuracies - such as the lack of bevel on the grenade ring and the shape of the broaching cuts - look close and you'll see what I mean. I do agree with you that it looks a lot better than the 5.5 we all know and despise, and I found it interesting that it makes an 11.5" barrel legal length. My question is, if it's over 16" by 1/4", couldn't Brick just not countersink his moderator as much and accomplish the same thing? The bodies look about the same length. I would prefer a Brick's moderator not countersunk as much, with up to an 1/8" longer body to make it legal with an 11.5" barrel if that's all it took. I'm guessing it's not quite that simple, but it really doesn't look over long, like some of Kurt's 5.5" customs did to me. Like I said, it 'look's the right length. Maybe the answer is 1/8" here and 1/8" there... Can you set them up side by side and compare OAL for us? ETA2: I notice the length of the wrench flat area on Tony's is longer also. Looks like this is the approach they took. Interesting. I still think Brick's is superior though. ETA3: I just noticed that's a BM moderator not Bricks. Reading is everything. Thought it was missing the cone... View Quote Agree 100% regarding the Brick being a better accurate choice. Also regarding the Tony FH not being correct in several details. But, its much better then the skinny 5.5 FHs(I built a 5.5+11.5"+A1 upper back in the early 80s. being my first ground-up, piece by piece from guns shows..build at the time. way back then, it and even having a forward assist A1 upper was very cool)I think the Brick is only 4.3-something long. The GR adds another .1-something extra in overall length together(both off the top of my head, from reading about it today at GB). The BM FH of mine is 4.5" long plus the GR. So its also slightly longer. I'm sure the Brick is prolly the correct length. I think your right.."..1/8" extra and another 1/8" there..."is prolll how the Tonys does it. I need to remeasure it for the total barrel length on the 11.5". ..digging out my cleaning rod again.. Fwiw, the BM+GR is exactly 4"-13/16s long. The Tonys is 5.25" long. |
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I like this one. <a href="http://s817.photobucket.com/user/VictorCastle/media/DSC_0004A_zpsffa3230c.jpg.html" target="_blank">http://i817.photobucket.com/albums/zz95/VictorCastle/DSC_0004A_zpsffa3230c.jpg</a> View Quote Agree again. Me too. Everything's there. Thats a 12.5" setup from the looks. THE best way, short of going SBR with the 11.5" barrel+Bricks. ETA:just remeasured the Tonys while again mounted on the above 11.5" barrel. Exactly 16.25" from the bolt face to the end of the flash hider. Its GTG in that regard. Currently, I believe theres 6 choices, of varying levels... SBR 12.5" barrel +brick 11.5" barrel +Brick pistol build Tonys +11.5" 5.5" +11.5" Heavy arse slip over. |
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http://www.ebay.com/itm/BravoTac-BRT-356-5-56-5-5-Long-Muzzle-Brake-XM177-Commando-11-5-Barrel-to-16-/321442381130?pt=LH_DefaultDomain_0&hash=item4ad7757d4a
I found this one piece moderator ^^^a couple of weeks ago and posted about it.http://www.ar15.com/forums/t_3_123/650509_XM177E2_One_Piece_Moderators.html A bit pricey IMO, but it looks quite a bit better than Tony's. I have a moderator and grenade ring coming from Brick, cheaper and better looking. If he had made an extended two piece design, I would have considered a pinned 11.5" barrel. |
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The only thing I'm not too found of on that 5.5" FH above on Ebay...is from the looks from the mouth/front, its tapered backward pretty thick, and it does it quickly from the front. One can see by the back of the vents, its already very thick and a relatively small bore. =heavier and less effective as a FH I would guess. The Tonys is at least, the same large dia all the down to the threads. Altho, both the BM and Tonys(and I'd suspect the Brick also) have a fist size fireball. Tested them both tonight.
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Quoted: Agree again. Me too. Everything's there. Thats a 12.5" setup from the looks. THE best way, short of going SBR with the 11.5" barrel+Bricks. ETA:just remeasured the Tonys while again mounted on the above 11.5" barrel. Exactly 16.25" from the bolt face to the end of the flash hider. Its GTG in that regard. Currently, I believe theres 6 choices, of varying levels... SBR 12.5" barrel +brick 11.5" barrel +Brick pistol build Tonys +11.5" 5.5" +11.5" Heavy arse slip over. View Quote View All Quotes View All Quotes Quoted: Quoted: I like this one. <a href="http://s817.photobucket.com/user/VictorCastle/media/DSC_0004A_zpsffa3230c.jpg.html" target="_blank">http://i817.photobucket.com/albums/zz95/VictorCastle/DSC_0004A_zpsffa3230c.jpg</a> Agree again. Me too. Everything's there. Thats a 12.5" setup from the looks. THE best way, short of going SBR with the 11.5" barrel+Bricks. ETA:just remeasured the Tonys while again mounted on the above 11.5" barrel. Exactly 16.25" from the bolt face to the end of the flash hider. Its GTG in that regard. Currently, I believe theres 6 choices, of varying levels... SBR 12.5" barrel +brick 11.5" barrel +Brick pistol build Tonys +11.5" 5.5" +11.5" Heavy arse slip over. |
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Check out CNCwarrior online. For $5 they make a spacer that looks like the rear of a USGI FH and is hardly noticable but once pinned with the FH it 's legal. Check out the 1st page of the KISS/IDF pic thread over in AR Discussions. Very first carbine was done that way (M4 barrel) and I'm about to have an A2 FH pinned on a SOCOM barrel like that. Personally I think ti looks better than the extended A1 or A2 FH, but that's also an option. At first glance you don't even notice the spacer...but that's my .02 View Quote View All Quotes View All Quotes Quoted:
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You might want to think about a 653 or 723 build instead. Good idea. I love the looks of the CM 629/XM177...........but I dont think perm attaching an A1 birdcage flash hider to a 14.5 inch barrel would get me to legal 16 inches? S Check out CNCwarrior online. For $5 they make a spacer that looks like the rear of a USGI FH and is hardly noticable but once pinned with the FH it 's legal. Check out the 1st page of the KISS/IDF pic thread over in AR Discussions. Very first carbine was done that way (M4 barrel) and I'm about to have an A2 FH pinned on a SOCOM barrel like that. Personally I think ti looks better than the extended A1 or A2 FH, but that's also an option. At first glance you don't even notice the spacer...but that's my .02 @Morg308 I checked the CNC Warrior website. But I cannot find the spacer that looks like the rear of a USGI FH in 1/2-28 threads? They do have one that is threaded for an AK barrel, is that what was used I wonder? Thanks |
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Actually, I'd be interested in what I think the OP was originally asking about - a decent looking slip-over that would bring a standard uncut off-the-shelf 14.5" barrel to legal length.
I'm wondering if some kind of spacer could be used inside the standard slip-overs that are available. I'm not sure how long the spacer would need to be to push the muzzle end of the moderator out to the 16.1" mark, but of course there would have to be enough thread past the spacer to get the moderator screwed on. Another approach might be to ream out the slip-over and put in an insert that was threaded on its inside to fit the barrel threads. Probably hard to visualize what I'm talking about without a drawing. |
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Actually, I'd be interested in what I think the OP was originally asking about - a decent looking slip-over that would bring a standard uncut off-the-shelf 14.5" barrel to legal length. I'm wondering if some kind of spacer could be used inside the standard slip-overs that are available. I'm not sure how long the spacer would need to be to push the muzzle end of the moderator out to the 16.1" mark, but of course there would have to be enough thread past the spacer to get the moderator screwed on. Another approach might be to ream out the slip-over and put in an insert that was threaded on its inside to fit the barrel threads. Probably hard to visualize what I'm talking about without a drawing. View Quote Actually.....I am very sure the slip over moderator I have.....The one I posted pictures of on this thread....will slip onto a 14.5 barrel and make it legal min length. I will double check. If you are interested in it....message me....I am no longer going to use it....so it's up for grabs. |
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Quoted: @Morg308 I checked the CNC Warrior website. But I cannot find the spacer that looks like the rear of a USGI FH in 1/2-28 threads? They do have one that is threaded for an AK barrel, is that what was used I wonder? Thanks View Quote http://www.cncwarrior.com/ProductDetails.asp?ProductCode=22289 |
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Actually.....I am very sure the slip over moderator I have.....The one I posted pictures of on this thread....will slip onto a 14.5 barrel and make it legal min length. I will double check. If you are interested in it....message me....I am no longer going to use it....so it's up for grabs. View Quote Please do double check. The way ATF measures is by putting a rod marked at 16" down the barrel from the muzzle to the face of the closed bolt. |
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Please do double check. The way ATF measures is by putting a rod marked at 16" down the barrel from the muzzle to the face of the closed bolt. View Quote View All Quotes View All Quotes Quoted:
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Actually.....I am very sure the slip over moderator I have.....The one I posted pictures of on this thread....will slip onto a 14.5 barrel and make it legal min length. I will double check. If you are interested in it....message me....I am no longer going to use it....so it's up for grabs. Please do double check. The way ATF measures is by putting a rod marked at 16" down the barrel from the muzzle to the face of the closed bolt. Okay....I will check....thanks. |
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@Morg308 I checked the CNC Warrior website. But I cannot find the spacer that looks like the rear of a USGI FH in 1/2-28 threads? They do have one that is threaded for an AK barrel, is that what was used I wonder? Thanks http://www.cncwarrior.com/ProductDetails.asp?ProductCode=22289 Opps.........I over looked it somehow. Thanks for the link. I hate browsing on my phone........wonder what else I have missed....LOL Thanks |
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Quoted: Opps.........I over looked it somehow. Thanks for the link. I hate browsing on my phone........wonder what else I have missed....LOL Thanks View Quote View All Quotes View All Quotes Quoted: Quoted: Quoted: @Morg308 I checked the CNC Warrior website. But I cannot find the spacer that looks like the rear of a USGI FH in 1/2-28 threads? They do have one that is threaded for an AK barrel, is that what was used I wonder? Thanks http://www.cncwarrior.com/ProductDetails.asp?ProductCode=22289 Opps.........I over looked it somehow. Thanks for the link. I hate browsing on my phone........wonder what else I have missed....LOL Thanks It's easy to miss, they call it a 1/2x28 jam nut. eta I used one to bring a USGI M4 barrel up to legal length with an A2 flash hider. |
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Agree again. Me too. Everything's there. Thats a 12.5" setup from the looks. THE best way, short of going SBR with the 11.5" barrel+Bricks. ETA:just remeasured the Tonys while again mounted on the above 11.5" barrel. Exactly 16.25" from the bolt face to the end of the flash hider. Its GTG in that regard. Currently, I believe theres 6 choices, of varying levels... SBR 12.5" barrel +brick 11.5" barrel +Brick pistol build Tonys +11.5" 5.5" +11.5" Heavy arse slip over. View Quote So is it clear that the brick installed on an uncut off-the-shelf 12.5" barrel gets you to 16"? I might be willing to do that... |
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Agree again. Me too. Everything's there. Thats a 12.5" setup from the looks. THE best way, short of going SBR with the 11.5" barrel+Bricks. ETA:just remeasured the Tonys while again mounted on the above 11.5" barrel. Exactly 16.25" from the bolt face to the end of the flash hider. Its GTG in that regard. Currently, I believe theres 6 choices, of varying levels... SBR 12.5" barrel +brick 11.5" barrel +Brick pistol build Tonys +11.5" 5.5" +11.5" Heavy arse slip over. So is it clear that the brick installed on an uncut off-the-shelf 12.5" barrel gets you to 16"? I might be willing to do that... almost http://i711.photobucket.com/albums/ww111/Robpics/BRICKS-1.jpg 12.5" barrel with a Brick's will work. Per Brick; 12.5" barrel - .63 threads = 11.87" 11.87" barrel + 4.34" moderator + .1" grenade ring = 16.31" STILL an inch too long for a REAL XM177E2 but it beats kissing Uncle's Ass. |
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12.5" barrel with a Brick's will work. Per Brick; 12.5" barrel - .63 threads = 11.87" 11.87" barrel + 4.34" moderator + .1" grenade ring = 16.31" STILL an inch too long for a REAL XM177E2 but it beats kissing Uncle's Ass. View Quote View All Quotes View All Quotes Quoted:
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Agree again. Me too. Everything's there. Thats a 12.5" setup from the looks. THE best way, short of going SBR with the 11.5" barrel+Bricks. ETA:just remeasured the Tonys while again mounted on the above 11.5" barrel. Exactly 16.25" from the bolt face to the end of the flash hider. Its GTG in that regard. Currently, I believe theres 6 choices, of varying levels... SBR 12.5" barrel +brick 11.5" barrel +Brick pistol build Tonys +11.5" 5.5" +11.5" Heavy arse slip over. So is it clear that the brick installed on an uncut off-the-shelf 12.5" barrel gets you to 16"? I might be willing to do that... almost http://i711.photobucket.com/albums/ww111/Robpics/BRICKS-1.jpg 12.5" barrel with a Brick's will work. Per Brick; 12.5" barrel - .63 threads = 11.87" 11.87" barrel + 4.34" moderator + .1" grenade ring = 16.31" STILL an inch too long for a REAL XM177E2 but it beats kissing Uncle's Ass. makes sense, the diagram and measurements above don't show a grenade ring. |
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Awesome.....but how hard is it to find a 12.5 inch pencil barrel....
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Awesome.....but how hard is it to find a 12.5 inch pencil barrel.... View Quote it's not a common length, especially in pencil profile. you'll more than likely need to get a 16" and have it cut down. john thomas is who i'd send it to. he can cut, rethread, blind pin and weld to bring to legal length and reparkerize. all in an amazingly fast turnaround time. |
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it's not a common length, especially in pencil profile. you'll more than likely need to get a 16" and have it cut down. john thomas is who i'd send it to. he can cut, rethread, blind pin and weld to bring to legal length and reparkerize. all in an amazingly fast turnaround time. View Quote View All Quotes View All Quotes Quoted:
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Awesome.....but how hard is it to find a 12.5 inch pencil barrel.... it's not a common length, especially in pencil profile. you'll more than likely need to get a 16" and have it cut down. john thomas is who i'd send it to. he can cut, rethread, blind pin and weld to bring to legal length and reparkerize. all in an amazingly fast turnaround time. Okay. Is he a forum member or is does he have a business? Thanks, once again. ... |
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Okay. Is he a forum member or is does he have a business? Thanks, once again. ... View Quote View All Quotes View All Quotes Quoted:
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Awesome.....but how hard is it to find a 12.5 inch pencil barrel.... it's not a common length, especially in pencil profile. you'll more than likely need to get a 16" and have it cut down. john thomas is who i'd send it to. he can cut, rethread, blind pin and weld to bring to legal length and reparkerize. all in an amazingly fast turnaround time. Okay. Is he a forum member or is does he have a business? Thanks, once again. ... you can email/im him here: http://www.ar15.com/member/member.html?id=111652 or you can visit his website: http://www.retroarmsworks.com/ |
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Not so fast...
Brick's diagram is dealing with the overall length including the barrel extension, but that's not how ATF measures it. They go from the bolt face (which sits somewhat inside the barrel extension) to the muzzle end of the barrel (including permed muzzle device, if any). Thinking about that, if the overall length of a 12.78" barrel with a permed Brick is the same as a Colt 16", and a Colt 16" is barely legal, then a permed Brick on a 12.5" barrel would still fall 0.28" short. If the grenade ring adds another 0.1", that still leaves you 0.18" short. But maybe a standard Colt 16" is 0.18" or more longer than it needs to be... I don't know. Similarly, a so-called 12.5" barrel might not really be exactly 12.5" as ATF measures it (for example, PWS lists the barrel length on their MK112 SBR as 12.75", which as an actual as-ATF-measures barrel would be enough to make the Brick work). Further, the exact length of a barrel of a given nominal length might vary. So, about the only way I know to tell would be to test it, but you'd need a 12.5" barrel in hand, and if you bought one but it didn't work you'd be kinda stuck. Of course you can solve that by cutting down a longer barrel, but the problem you get into there is that purpose-built SBR barrels have bigger gas ports than longer barrels. An actual 12.5" barrel would have the right gas port diameter (presumably), while a cut down longer barrel (presumably) would not. One possibility is to find a vendor that both does barrel work and stocks 12.5" barrels, and see if they'll test it for you if you send them a Brick. Skinny barrels with gas ports located for a carbine gas system are rare these days anyway. BCM used to make them in 14.5" a couple years ago, and I used one with a permed A2X in a non-retro LW carbine build. They don't show those on their web now, even as out of stock. Daniel Defense makes them in 14.5", but it is .750" in the gas block area despite being skinny fore & aft of that, so you'd either have to use a .750 FSB or have it turned down anyway. As they make a govt profile 12.5", if a 12.5" would work I'd probably go with that for having the right gas port and have it turned down to skinny (ADCO stocks them and would do the work). |
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On my XM177E2 build, I had a 16" lightweight barrel cut down to 12.75" and with Bricks's moderator permanently mounted it functions just fine. On my XM607 build (SBR) with a 10" barrel that was 16" to start with, I had the gas port opened up just a bit and it functions great.
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Quoted:
On my XM177E2 build, I had a 16" lightweight barrel cut down to 12.75" and with Bricks's moderator permanently mounted it functions just fine. On my XM607 build (SBR) with a 10" barrel that was 16" to start with, I had the gas port opened up just a bit and it functions great. View Quote Good to know! Maybe it only becomes a problem with the 10" barrels. What weight buffer do you run in the 12.75"? |
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Quoted:
Good to know! Maybe it only becomes a problem with the 10" barrels. What weight buffer do you run in the 12.75"? View Quote View All Quotes View All Quotes Quoted:
Quoted:
On my XM177E2 build, I had a 16" lightweight barrel cut down to 12.75" and with Bricks's moderator permanently mounted it functions just fine. On my XM607 build (SBR) with a 10" barrel that was 16" to start with, I had the gas port opened up just a bit and it functions great. Good to know! Maybe it only becomes a problem with the 10" barrels. What weight buffer do you run in the 12.75"? Standard carbine buffer with M16 BCG. Works great. |
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