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That’s what I have on mine. It fits and moves the light away from the front sight. Without it my light was resting right up against the front sight. Attached File Attached File Attached File |
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I bought an 11.3 ba hanson .625 barrel. I was looking ath the 10.5 mlok cmr for a perfect fit. Has anyone tried the ballistic advantage .625 gas block that comes with the barrels? Worried about clearence. Also are there 2 differrent versions of the mlok rail. Some of google images show no qd sockets and other/ show them having them. |
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Originally Posted By pev942:
I bought an 11.3 ba hanson .625 barrel. I was looking ath the 10.5 mlok cmr for a perfect fit. Has anyone tried the ballistic advantage .625 gas block that comes with the barrels? Worried about clearence. Also are there 2 differrent versions of the mlok rail. Some of google images show no qd sockets and other/ show them having them. |
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Originally Posted By pev942:
I bought an 11.3 ba hanson .625 barrel. I was looking ath the 10.5 mlok cmr for a perfect fit. Has anyone tried the ballistic advantage .625 gas block that comes with the barrels? Worried about clearence. Also are there 2 differrent versions of the mlok rail. Some of google images show no qd sockets and other/ show them having them. I've wrestled with picking up a 13.7" BA hansen, but I think the new 13" mlok rail (which I have) is too long to really work well. Does anyone know for sure? Pic thread: 
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"Success cannot be purchased with cash. Success must be financed, and you gotta make payments every single day if you wanna own that bitch."
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Do the new MLOK CMR rails use the same barrel nut as the original CMR Rails (Gen 1)? Have a Gen1 14" and am thinking about moving to the newer version mlok 13". I can always change the barrel nut but if the new rail uses the same as the originals it would be nice :).
EDIT - according to this review, although they updated the barrel nut to appeal to the masses, the new rail will work fine on original barrel nut... http://www.ar15news.com/2016/01/21/centurion-arms-adds-keymod-m-lok-cmr-lineup/ The overall profile of the new CMR KeyMod and M-LOK rails is very similar to the original CMR and still features anti-rotation tabs. The barrel nut is also very similar, in fact the new rail will mount to an older CMR barrel nut, but Centurion Arms actually modified the new barrel nut to be able to tighten them using a standard AR-15 castle nut wrench. |
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Originally Posted By 78Staff:
Do the new MLOK CMR rails use the same barrel nut as the original CMR Rails (Gen 1)? Have a Gen1 14" and am thinking about moving to the newer version mlok 13". I can always change the barrel nut but if the new rail uses the same as the originals it would be nice :). EDIT - according to this review, although they updated the barrel nut to appeal to the masses, the new rail will work fine on original barrel nut... http://www.ar15news.com/2016/01/21/centurion-arms-adds-keymod-m-lok-cmr-lineup/ I do have another 5.56 rifle that has a gen 1 barrel nut and a gen 2 MLOK CMR on it that has seen quite a few rounds and classes with no discernible movement. YMMV |
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Originally Posted By cjwwd2: In my experience, the barrel nuts are different. I had this issue on a 7.62 build where I was using a gen 1 barrel nut and a gen 2 CMR (had to be replaced because it was bent). After a range trip, the CMR had begun to slip forward off the gen 1 barrel nut. I do have another 5.56 rifle that has a gen 1 barrel nut and a gen 2 MLOK CMR on it that has seen quite a few rounds and classes with no discernible movement. YMMV  . If I could find a metal rail section for the CMR I probably wouldn't change it.
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Originally Posted By 78Staff: Yeah I think I read that some early 7.62 versions had issues... I haven't decided tbh I am also thinking about just going back to a Larue 13.2" Stealth rail... I'm just tired of my vertical grip flexing on that plastic CMR rail section . If I could find a metal rail section for the CMR I probably wouldn't change it.I’m pretty sure hole spacing is 2.375” on the CMR as I have a B5 Gripstop mounted on two of mine. |
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Originally Posted By 78Staff:
@dcf1981 - Thanks again for the link - my rail sections arrived and line right up with the CMR spacing. Metal rail sections, finally! 
https://i.imgur.com/Ux4HdjN.jpg https://i.imgur.com/JgBfe9z.jpg |
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Weapon outfitters has the new Gen1 handguards in stock.
https://www.weaponoutfitters.com/centurion-arms-5-56-original-cmr-rails-gen1.html |
I expect a girl to get freaky. You know, get really enthusiastic about the opportunity to eat my ass. ----- posted by Fiver
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Originally Posted By MALICIOUS2551:
Weapon outfitters has the new Gen1 handguards in stock. https://www.weaponoutfitters.com/centurion-arms-5-56-original-cmr-rails-gen1.html
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So I got my 10.5 cmr mlok and the the ba hanson .625 gas block easily clears the rail. I measured before ordering and their .625 gas block is smaller than the ca .750 gas block. Here are some pics. Side view Front view Muzzle |
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Originally Posted By MALICIOUS2551:
Weapon outfitters has the new Gen1 handguards in stock. https://www.weaponoutfitters.com/centurion-arms-5-56-original-cmr-rails-gen1.html And I thought the $550 Pelican cases were bad...
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Originally Posted By weaponoutfitters:
Gonna pull one of the 13.5" variants for a new build! Originally Posted By weaponoutfitters:
Originally Posted By MALICIOUS2551:
Weapon outfitters has the new Gen1 handguards in stock. https://www.weaponoutfitters.com/centurion-arms-5-56-original-cmr-rails-gen1.html Ordered a 13.6 version. The same 13.6 is listed twice on the website with two different prices. I chose the link you supplied on facebook that was $5.00 cheaper. |
I expect a girl to get freaky. You know, get really enthusiastic about the opportunity to eat my ass. ----- posted by Fiver
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Originally Posted By SoTexAggie:
https://www.AR15.Com/media/mediaFiles/207228/IMG_6334-511566.JPG |
"Success cannot be purchased with cash. Success must be financed, and you gotta make payments every single day if you wanna own that bitch."
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Originally Posted By CCLJ03:
Whudda beaut! Attached File |
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Originally Posted By SoTexAggie: Thanks! It's quickly becoming my favorite rifle. I threw my cousin's micro on it and now I'm debating getting rid of the Comp M4 for one. It just felt "right" on there https://www.AR15.Com/media/mediaFiles/207228/IMG_6327-512530.JPG Extra durability is negligible. Field of view isn't a thing for red dots. And cr123 vs AA(?) is a dumb thing to argue about. Between weight savings and visual proportionality.... I'll take the t2! |
"Success cannot be purchased with cash. Success must be financed, and you gotta make payments every single day if you wanna own that bitch."
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Originally Posted By CCLJ03:
Never having used a comp m4, I struggle to see the advantage over the t2. Extra durability is negligible. Field of view isn't a thing for red dots. And cr123 vs AA(?) is a dumb thing to argue about. Between weight savings and visual proportionality.... I'll take the t2! |
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I'm just patiently waiting for my gunsmith to finish my pin and weld...
Fucking stoked to have a new production Gen 1 CMR!!! Old Photo of an original Gen 1 CMR with 14.5" barrel from 2014 or so 
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Originally Posted By weaponoutfitters: I'm just patiently waiting for my gunsmith to finish my pin and weld... Fucking stoked to have a new production Gen 1 CMR!!! Old Photo of an original Gen 1 CMR with 14.5" barrel from 2014 or so https://78.media.tumblr.com/4dc543888b379068e74f4e790d1358e9/tumblr_p75kkiB3xB1qjtttio1_1280.jpg Same here! Its obvious that Monty improved the original design by looking at the contents of the hardware included. If you get time you should toss up a few pics of the hardware. |
I expect a girl to get freaky. You know, get really enthusiastic about the opportunity to eat my ass. ----- posted by Fiver
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Originally Posted By cjwwd2:
How much is a gen 1 CMR-12 worth? so you have to decide if that would bother you... If the Gen 2 and later mods were back to Gen 1 length I would have upgraded already, but I'm not swapping barrels just to run a Gen 2 lol. I may swap back to a Larue 13.2" anyway...
Gen 1 14" (13.65") with Surefire Socom RC - older pic but shows the gap of a Gen 1/14.5" 
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Originally Posted By 78Staff:
I'd say $125-$150 probably as long as it's not a beater. It's not like they are desired over the later Gens, in fact the Gen 1's had more alignment/drop down issues than the later ones. The real draw of a Gen 1 is the 14", which is only 13.65" so you can run most cans with a 14.5" barrel. The Gen 2 14"s are 14.25" and thus too long and require a 14.7" barrel... But, with the 14" Gen 1 you also have the mis-aligned vent holes/rail panel holes too so you have to decide if that would bother you... If the Gen 2 and later mods were back to Gen 1 length I would have upgraded already, but I'm not swapping barrels just to run a Gen 2 lol. I may swap back to a Larue 13.2" anyway...
Gen 1 14" (13.65") with Surefire Socom RC - older pic but shows the gap of a Gen 1/14.5" https://i.imgur.com/BT5OfUU.jpg https://i.imgur.com/U8fHiPoh.jpg |
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Originally Posted By Frens: How to tell gen1 from gen2? |
| I'm thinking of getting the CMR 308/7.62 12" rail for a build I'm going to do. There were some posts earlier that were talking about the handguard moving foward on the barrel nut and that there was a gen 2 barrel nut that prevented this from happening. Does anyone have pictures of the two different 308 CMR barrel nuts for reference? I may pin and weld the flash hider on this build and need to make sure it has the correct, updated barrel nut before doing so. |
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Just scored a 13.5 mlok CMR for $203 on optics planet. It was the second to last one available. Other sizes had only one or two left in stock also.
A couple questions; I have a couple Geissele GBs and a YHM GB, does anyone know if they will work with the mlok CMR? Will a Geissele barrel nut tool work with a CMR barrel nut? Thanks |
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Well for anyone interested, I heard back from Centurion Arms today and this is a Gen 1 barrel nut for the 7.62 CMR rail. Corrie is shipping me out an updated one and a wrench. Great customer service. This rail was purchased from Rainier Arms last week, so apparently they must have some old stock. So if you order one from them, just be prepared that you may have to get an updated nut from Centurion before installing. 
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Originally Posted By lwbyo1:
Well for anyone interested, I heard back from Centurion Arms today and this is a Gen 1 barrel nut for the 7.62 CMR rail. Corrie is shipping me out an updated one and a wrench. Great customer service. This rail was purchased from Rainier Arms last week, so apparently the must have some old stock. So if you order one from them, just be prepared that you may have to get an updated nut from Centurion before installing. https://i.imgur.com/l8zYL59.jpg?1 
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Originally Posted By cjwwd2:
Wow, I ordered a 7.62 rail from them over 2 years ago and had the same issue. They must be sitting on a mountain of those rails. The first one I had from them was also crooked Originally Posted By cjwwd2:
Originally Posted By lwbyo1:
Well for anyone interested, I heard back from Centurion Arms today and this is a Gen 1 barrel nut for the 7.62 CMR rail. Corrie is shipping me out an updated one and a wrench. Great customer service. This rail was purchased from Rainier Arms last week, so apparently the must have some old stock. So if you order one from them, just be prepared that you may have to get an updated nut from Centurion before installing. https://i.imgur.com/l8zYL59.jpg?1 I was so focused on the barrel nut I only glanced over the rail when I received it. I'll definitely have to give it a more thorough looking over later to make sure it's not bent. |
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So i have a 18" faxon gunner with rifle length gas..i'm running a superlative .625 adj gas block. I want to get a 13" mlok CMR rail but i'm not sure if my block will clear the ID of the rail..i think alittle bit of gas block poke-out looks cool, goes along with my SPRish build. Rainier arms or the centurion website to order? I can't get over the cmr's look with the little covers.. |
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Originally Posted By lwbyo1:
Well for anyone interested, I heard back from Centurion Arms today and this is a Gen 1 barrel nut for the 7.62 CMR rail. Corrie is shipping me out an updated one and a wrench. Great customer service. This rail was purchased from Rainier Arms last week, so apparently they must have some old stock. So if you order one from them, just be prepared that you may have to get an updated nut from Centurion before installing. https://i.imgur.com/l8zYL59.jpg?1 .
I would really like to see the differences between the gen 1 and the gen 2. I put mine together a few months ago, and it's going to be a bear to get back apart if it's the wrong nut. |
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Originally Posted By kb1:
She told me that was the gen 2 barrel nut for 7.62 .
I would really like to see the differences between the gen 1 and the gen 2. I put mine together a few months ago, and it's going to be a bear to get back apart if it's the wrong nut. Originally Posted By kb1:
Originally Posted By lwbyo1:
Well for anyone interested, I heard back from Centurion Arms today and this is a Gen 1 barrel nut for the 7.62 CMR rail. Corrie is shipping me out an updated one and a wrench. Great customer service. This rail was purchased from Rainier Arms last week, so apparently they must have some old stock. So if you order one from them, just be prepared that you may have to get an updated nut from Centurion before installing. https://i.imgur.com/l8zYL59.jpg?1 .
I would really like to see the differences between the gen 1 and the gen 2. I put mine together a few months ago, and it's going to be a bear to get back apart if it's the wrong nut. 
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Originally Posted By AR_DairyFarmer:
Originally Posted By cjwwd2: I have used one on a CMR 9.5" with no issues There is clearance on the bottom, but the curved portion interferes with the rail.  Its really, really close  The side plate has the least amount of clearance. But it doesn't touch. Now I don't know if there is contact while firing, Or when a suppressor is hanging off the barrel. 
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