User Panel
Posted: 5/5/2013 12:10:10 AM EDT
[Last Edit: Stickman]
The Centurion Modular Rail (CMR) was first shown at SHOT 2013, and was shown installed on a Centurion Arms complete .308 build. The rail received positive reviews from everyone who handled it, but the most common question was how long it would be until a 5.56 variant was released.
For the past several months, I've been working with the Centurion Arms .308 Battle Rifle, and the CMR rail has quickly become one of my favorite. The over all feel and light weight provides a great balance for the .308 platform. Fast forwarding to more recent times, and I'm now in a position to comment on the 5.56 CMR rails. I have had a chance to run drills, do several installations, as well as have a friend and fellow instructor go over them with me. Without a doubt, these are some of the easiest, if not "THE" easiest barrel nut and rail assembly either of us have ever installed. The Centurion Modular Rail is first being released in 12 and 14 inch versions in both the 5.56 and .308 variants. The 12" rail weighs 10 7/8 oz (308g), and with the barrel nut and three installation screws is a total of 13 1/8oz (371g). Total length is roughly 12 1/2", which is normal for most rails labeled as 12 inchers. The reason for this is that is the length needed to cover the receiver to FSB on a rifle, which is the traditional 12"/ rifle rail. If the CMR used an old school locking collar, the actual rail would be 12" while the collar made up the difference. The 14" rail weighs 11 3/4 oz (333g), and with the barrel nut and three installation screws is a total of 14 oz (398g). Machine work on the rails is all extremely high quality, and the anodizing is very clean. It is evident these rails have a lot of machine time, and for people who are unaware, machine time is what is the driving force behind the end price. This is why you see cheap, heavy rails with sharp edges being sold for low prices. This is not a cheap heavy rail, and it does not have sharp edges. The sides are blended nicely, and the lightening / cooling/ vent holes are well laid out. Anti-rotation tabs are part of the rail, and are nice and snug on each of the forged receivers we used (3 total). There are QD holes fore and aft on each side. Installation of the rail is easy, and it is entirely possible we will do another article showing the various steps. For now, we will just talk about it a bit. The barrel nut is grooved, and the bolts which lock the barrel nut to the rail ensure there can be no movement once installed. The barrel nut is tightened with an old school barrel nut wrench, the type that only has one tooth. These are pretty cheap to pick up if you don't already have one, and don't slip off like a standard barrel nut. The other way to do it is using a spanner wrench (the pin or hook type), which should run you under $15 for most hardware or similar stores. Torque specs are 30-80 ft pounds, which is simple when there is no need to line up a gas tube. With the barrel nut installed, slide the end of the rail into place. It may take a firm press to lock it up against the receiver, and it is normal to have a tiny space in between the two parts. Now use a 3/32 allen head wrench and install the 3 screws. There is no need for thread locker, but you should alternate tightening each screw and side just like you would a lug nut. Watch your alignment on the top of the rail and your receiver, but we found everything lined up perfect ever after we took it apart a few times. The Centurion Modular Rails will be hitting your AR15 stores this month in 12 & 14" and in 5.56 and .308. You may notice the second picture has a Surefire Scout Light mounted, this is a prototype of one of the mounts Centurion Arms will be releasing along with the rails. 1913 sections are also going to be coming out shortly, and none of these add one pieces use backer plates or screws. There are also some additional items coming out for this rail series, but I'm not 100% sure what I can or can't talk about. When I get more information, and verify that I can speak freely, I'll post more info and pictures. If you have any questions, feel free to fire away, I'll answer whatever I can. |
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Stick
[email protected] www.rainierarms.com (253) 218-2999 Office (253) 218-2998 FAX www.weaponevolution.com www.stickgunner.com |
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Originally Posted By Stickman: Going with the smallest one possible is an easy way to make sure. However, it is also worth pointing out the newer version CMR has a little more room inside. View Quote View All Quotes View All Quotes Originally Posted By Stickman: Originally Posted By CastorTroy: Originally Posted By ejc204: Figured I'd ask this question in this thread, does anyone know if a BCM .625 gas block will fit under the Centurion CMR with a BCM's ELW Barrel? i'd go with the sentry arms gb6 Going with the smallest one possible is an easy way to make sure. However, it is also worth pointing out the newer version CMR has a little more room inside. I guess we didn't ask if he's got a new or old CMR. A new CMR should have no problem |
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Im not saying duracoat fucks up function, I am saying nutnfancy does. -RustedAce
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I didn't order the CMR yet, I was waiting to ask my question in here. I already got the barrel and everything else though. I have been eyeing the CMR for awhile. I liked the Troy Vtac and have been waiting to get my hands on the CMR.
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Does anyone know if there are any plans for a 7-7.25" version?
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CMR is on sale at AIM
link for the lazy http://www.aimsurplus.com/product.aspx?item=XCENT01112&name=Centurion+ARMS+CMR+12%22+5.56+Rail+System&groupid=714 |
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"Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws." - Plato
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Originally Posted By stlb55:
FYI, I got an email back from them. They have discussed it several times, but nothing in the works right now. View Quote View All Quotes View All Quotes Originally Posted By stlb55:
Originally Posted By stlb55:
Does anyone know if there are any plans for a 7-7.25" version? FYI, I got an email back from them. They have discussed it several times, but nothing in the works right now. Probably because they don't sell well. |
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So which rails have panels that actually line up? Or is there a way to make the panels line up correctly on the 14" version? Specifically the 7.62 version, but also interested in 5.56.
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Originally Posted By BoHeck:
So which rails have panels that actually line up? Or is there a way to make the panels line up correctly on the 14" version? Specifically the 7.62 version, but also interested in 5.56. View Quote When you say "actually line up", you sound like that is an important part of the program. It isn't. If looks are the most important things, cut the first series of panels that you install, and the rest will line up. Looks are subjective, to me they all look good. To you, it may be different. |
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Originally Posted By Stickman:
When you say "actually line up", you sound like that is an important part of the program. It isn't. If looks are the most important things, cut the first series of panels that you install, and the rest will line up. Looks are subjective, to me they all look good. To you, it may be different. View Quote View All Quotes View All Quotes Originally Posted By Stickman:
Originally Posted By BoHeck:
So which rails have panels that actually line up? Or is there a way to make the panels line up correctly on the 14" version? Specifically the 7.62 version, but also interested in 5.56. When you say "actually line up", you sound like that is an important part of the program. It isn't. If looks are the most important things, cut the first series of panels that you install, and the rest will line up. Looks are subjective, to me they all look good. To you, it may be different. I love the way the rail looks. Hate the way the panels look when not aligned. It looks sloppy to me. There are alot if rails that would work for a lot less money. So no, they aren't the most important thing, but it would sway my decision. |
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Originally Posted By BoHeck:
I love the way the rail looks. Hate the way the panels look when not aligned. It looks sloppy to me. There are alot if rails that would work for a lot less money. So no, they aren't the most important thing, but it would sway my decision. View Quote View All Quotes View All Quotes Originally Posted By BoHeck:
Originally Posted By Stickman:
Originally Posted By BoHeck:
So which rails have panels that actually line up? Or is there a way to make the panels line up correctly on the 14" version? Specifically the 7.62 version, but also interested in 5.56. When you say "actually line up", you sound like that is an important part of the program. It isn't. If looks are the most important things, cut the first series of panels that you install, and the rest will line up. Looks are subjective, to me they all look good. To you, it may be different. I love the way the rail looks. Hate the way the panels look when not aligned. It looks sloppy to me. There are alot if rails that would work for a lot less money. So no, they aren't the most important thing, but it would sway my decision. If I remember correctly, they're lined up on the Gen 2 rails. |
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Team Ranstad
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Originally Posted By Mecha_Loopy:
If I remember correctly, they're lined up on the Gen 2 rails. View Quote View All Quotes View All Quotes Originally Posted By Mecha_Loopy:
Originally Posted By BoHeck:
Originally Posted By Stickman:
Originally Posted By BoHeck:
So which rails have panels that actually line up? Or is there a way to make the panels line up correctly on the 14" version? Specifically the 7.62 version, but also interested in 5.56. When you say "actually line up", you sound like that is an important part of the program. It isn't. If looks are the most important things, cut the first series of panels that you install, and the rest will line up. Looks are subjective, to me they all look good. To you, it may be different. I love the way the rail looks. Hate the way the panels look when not aligned. It looks sloppy to me. There are alot if rails that would work for a lot less money. So no, they aren't the most important thing, but it would sway my decision. If I remember correctly, they're lined up on the Gen 2 rails. After the Gen 2 CMR 12" came out a few weeks back, the entire lineup is now Gen 2 (lightening cuts etc and revised mounting screws etc) |
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[email protected]
http://www.weaponoutfitters.com https://www.facebook.com/weaponoutfitters https://instagram.com/weaponoutfitters/ |
Originally Posted By weaponoutfitters:
After the Gen 2 CMR 12" came out a few weeks back, the entire lineup is now Gen 2 (lightening cuts etc and revised mounting screws etc) http://41.media.tumblr.com/01ecd6de58cd959f7e9930887aa9fbd3/tumblr_ntt30q4cGw1qjtttio3_1280.jpg https://41.media.tumblr.com/c4f2dd22d9a94f85002b077bb9c36461/tumblr_nuzr3uZNNt1qjtttio1_1280.jpg View Quote View All Quotes View All Quotes Originally Posted By weaponoutfitters:
Originally Posted By Mecha_Loopy:
Originally Posted By BoHeck:
Originally Posted By Stickman:
Originally Posted By BoHeck:
So which rails have panels that actually line up? Or is there a way to make the panels line up correctly on the 14" version? Specifically the 7.62 version, but also interested in 5.56. When you say "actually line up", you sound like that is an important part of the program. It isn't. If looks are the most important things, cut the first series of panels that you install, and the rest will line up. Looks are subjective, to me they all look good. To you, it may be different. I love the way the rail looks. Hate the way the panels look when not aligned. It looks sloppy to me. There are alot if rails that would work for a lot less money. So no, they aren't the most important thing, but it would sway my decision. If I remember correctly, they're lined up on the Gen 2 rails. After the Gen 2 CMR 12" came out a few weeks back, the entire lineup is now Gen 2 (lightening cuts etc and revised mounting screws etc) http://41.media.tumblr.com/01ecd6de58cd959f7e9930887aa9fbd3/tumblr_ntt30q4cGw1qjtttio3_1280.jpg https://41.media.tumblr.com/c4f2dd22d9a94f85002b077bb9c36461/tumblr_nuzr3uZNNt1qjtttio1_1280.jpg The AR-10 versions are not Gen 2 |
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Will I be able to put an 11" rail on an 11.5" barrel and still run suppressed? Omega is the suppressor.
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Originally Posted By BoHeck:
The AR-10 versions are not Gen 2 View Quote View All Quotes View All Quotes Whoops, forgot about that. Yup, you're 100% right, the AR-10 rails are not going to be moving to Gen 2 for a while Originally Posted By Holden:
Will I be able to put an 11" rail on an 11.5" barrel and still run suppressed? Omega is the suppressor. Shouldn't be a problem, with manufacturer quote length of 10.994”. |
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[email protected]
http://www.weaponoutfitters.com https://www.facebook.com/weaponoutfitters https://instagram.com/weaponoutfitters/ |
Originally Posted By weaponoutfitters:
After the Gen 2 CMR 12" came out a few weeks back, the entire lineup is now Gen 2 (lightening cuts etc and revised mounting screws etc) http://41.media.tumblr.com/01ecd6de58cd959f7e9930887aa9fbd3/tumblr_ntt30q4cGw1qjtttio3_1280.jpg https://41.media.tumblr.com/c4f2dd22d9a94f85002b077bb9c36461/tumblr_nuzr3uZNNt1qjtttio1_1280.jpg View Quote View All Quotes View All Quotes Originally Posted By weaponoutfitters:
Originally Posted By Mecha_Loopy:
Originally Posted By BoHeck:
Originally Posted By Stickman:
Originally Posted By BoHeck:
So which rails have panels that actually line up? Or is there a way to make the panels line up correctly on the 14" version? Specifically the 7.62 version, but also interested in 5.56. When you say "actually line up", you sound like that is an important part of the program. It isn't. If looks are the most important things, cut the first series of panels that you install, and the rest will line up. Looks are subjective, to me they all look good. To you, it may be different. I love the way the rail looks. Hate the way the panels look when not aligned. It looks sloppy to me. There are alot if rails that would work for a lot less money. So no, they aren't the most important thing, but it would sway my decision. If I remember correctly, they're lined up on the Gen 2 rails. After the Gen 2 CMR 12" came out a few weeks back, the entire lineup is now Gen 2 (lightening cuts etc and revised mounting screws etc) http://41.media.tumblr.com/01ecd6de58cd959f7e9930887aa9fbd3/tumblr_ntt30q4cGw1qjtttio3_1280.jpg https://41.media.tumblr.com/c4f2dd22d9a94f85002b077bb9c36461/tumblr_nuzr3uZNNt1qjtttio1_1280.jpg Is this a 12" with a 13.7"/14.5" barrel? |
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On Time. On Target.
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Originally Posted By arzombie:
It appears to be a 13.7" That's what mine is http://images.tapatalk-cdn.com/15/10/24/ee07078a50e124ce7171c43e2a90e4e6.jpg View Quote View All Quotes View All Quotes Originally Posted By arzombie:
Is this a 12" with a 13.7"/14.5" barrel? It appears to be a 13.7" That's what mine is http://images.tapatalk-cdn.com/15/10/24/ee07078a50e124ce7171c43e2a90e4e6.jpg Wait, did the surefire brake bring it to legal length or is that an sbr? |
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Thank you Jeff Reed for making us realize that we need to enjoy life.
Just because it comes from the same location does not mean it is the same product. A queef isn't a baby.-Keith_J |
not sure, that's an SBR lower, but it might I haven't measured
edit: I just went and measured with a cleaning rod, with enough shims/crush washers combination of the two it could work if you could perm. attach it. |
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Can anyone post a pic or a link of a pic for a 11" CMR on a 11.5" barrel?
Thanks, |
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Are gas blocks still an issue with the newer rails? I'd like to build a 14.5" bravo company lightweight upper with a 14" cmr.
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Thank you Jeff Reed for making us realize that we need to enjoy life.
Just because it comes from the same location does not mean it is the same product. A queef isn't a baby.-Keith_J |
Originally Posted By Stickman:
https://40.media.tumblr.com/e08b97d169f1cbf55602779d6a806c5a/tumblr_nu4ic6XLaw1rrcg2fo1_1280.jpg View Quote STICK?? What muzzle device is this and is it worth a damn?? |
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AR-15 Armorer Instructor
S&W M&P Armorer |
Originally Posted By GoRebels:
STICK?? What muzzle device is this and is it worth a damn?? View Quote View All Quotes View All Quotes Originally Posted By GoRebels:
Originally Posted By Stickman:
https://40.media.tumblr.com/e08b97d169f1cbf55602779d6a806c5a/tumblr_nu4ic6XLaw1rrcg2fo1_1280.jpg STICK?? What muzzle device is this and is it worth a damn?? Battlecomp 1.5 and YES |
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Originally Posted By lowonair:
Are gas blocks still an issue with the newer rails? I'd like to build a 14.5" bravo company lightweight upper with a 14" cmr. View Quote Gonna ask again. I know there were issues with government profile barrels, but what about a lightweight with a .625 gas block? Were the lightweight barrel gas blocks an issue with. The older version? |
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Thank you Jeff Reed for making us realize that we need to enjoy life.
Just because it comes from the same location does not mean it is the same product. A queef isn't a baby.-Keith_J |
Originally Posted By AWDeity:
Battlecomp 1.5 and YES View Quote View All Quotes View All Quotes Originally Posted By AWDeity:
Originally Posted By GoRebels:
Originally Posted By Stickman:
https://40.media.tumblr.com/e08b97d169f1cbf55602779d6a806c5a/tumblr_nu4ic6XLaw1rrcg2fo1_1280.jpg STICK?? What muzzle device is this and is it worth a damn?? Battlecomp 1.5 and YES Yeah, if you like your muzzle being pushed too far down on every shot. I can't stand the battlecomp. |
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Originally Posted By Gazorpazorp:
Yeah, if you like your muzzle being pushed too far down on every shot. I can't stand the battlecomp. View Quote View All Quotes View All Quotes Originally Posted By Gazorpazorp:
Originally Posted By AWDeity:
Originally Posted By GoRebels:
Originally Posted By Stickman:
https://40.media.tumblr.com/e08b97d169f1cbf55602779d6a806c5a/tumblr_nu4ic6XLaw1rrcg2fo1_1280.jpg STICK?? What muzzle device is this and is it worth a damn?? Battlecomp 1.5 and YES Yeah, if you like your muzzle being pushed too far down on every shot. I can't stand the battlecomp. Never had that problem. |
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Thank you Jeff Reed for making us realize that we need to enjoy life.
Just because it comes from the same location does not mean it is the same product. A queef isn't a baby.-Keith_J |
Originally Posted By Engel12626:
I'm pretty sure the lightweight barrels with the .625 journal didn't have any fit issues. Don't quote me on that though. And because picture thread, I don't remember if I posted this one yet https://i.imgur.com/D4ovaoG.jpg View Quote View All Quotes View All Quotes Originally Posted By Engel12626:
Originally Posted By lowonair:
Originally Posted By lowonair:
Are gas blocks still an issue with the newer rails? I'd like to build a 14.5" bravo company lightweight upper with a 14" cmr. Gonna ask again. I know there were issues with government profile barrels, but what about a lightweight with a .625 gas block? Were the lightweight barrel gas blocks an issue with. The older version? I'm pretty sure the lightweight barrels with the .625 journal didn't have any fit issues. Don't quote me on that though. And because picture thread, I don't remember if I posted this one yet https://i.imgur.com/D4ovaoG.jpg I have used SLR .625 gas block without issue on a Spike's 14.5" lightweight profile and a SLR .750 on a Daniel Defense 10.3" Gov't profile. I don't think a lightweight profile and a .625 gas block would be an issue |
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AR-15 Armorer Instructor
S&W M&P Armorer |
Originally Posted By M4ger:
https://c2.staticflickr.com/2/1527/24114303240_5c4f9de579_k.jpg https://c2.staticflickr.com/2/1573/24409915955_6192b92b18_k.jpg View Quote That's hot! What the barrel length and rail length? |
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Originally Posted By INTrooper4255:
That's hot! What the barrel length and rail length? View Quote View All Quotes View All Quotes Originally Posted By INTrooper4255:
That's hot! What the barrel length and rail length? 16" Critical Capabilities SS barrel with a KAC low profile gas block and 14" CMR. |
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AR-15 Armorer Instructor
S&W M&P Armorer |
Originally Posted By M4ger:
16" Critical Capabilities SS barrel with a KAC low profile gas block and 14" CMR. View Quote View All Quotes View All Quotes Originally Posted By M4ger:
Originally Posted By INTrooper4255:
That's hot! What the barrel length and rail length? 16" Critical Capabilities SS barrel with a KAC low profile gas block and 14" CMR. Great, thanks! |
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You're quite welcome.
I only used the KAC gas block because I had picked up a Centurion block that was employed on a SR15 upper with a rifle length URXIII and the Centurion block fit better under the folding front sight. Anyone reading that at face value would put me in a call out thread for using a $100 Knight's block on a $150 barrel. I'd hope someone would be able to use this info if a Centurion gas block isn't available for installation on a CMR. |
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AR-15 Armorer Instructor
S&W M&P Armorer |
New MLOK and Keymod versions coming out!
http://www.recoilweb.com/new-m-lok-and-keymod-cmr-handguards-from-centurion-arms-83311.html |
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Wow with introductory pricing, I think I'll order one of those up.
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"Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws." - Plato
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I am a KAC addict. If you're selling something from them, please email me.
AR-15 Armorer Instructor S&W M&P Armorer |
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Originally Posted By M4ger:
Finished with Strike Eagle 1-6 https://c2.staticflickr.com/2/1582/24144412759_2248e865d4_k.jpg View Quote How do you like the Strike Eagle? Been thinking about one for a hunting rifle this year. |
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Avionics Electrical Technician, USCG
Proud Member of Team Ranstad |
Originally Posted By gadgetguy1288:
How do you like the Strike Eagle? Been thinking about one for a hunting rifle this year. View Quote View All Quotes View All Quotes Originally Posted By gadgetguy1288:
Originally Posted By M4ger:
Finished with Strike Eagle 1-6 https://c2.staticflickr.com/2/1582/24144412759_2248e865d4_k.jpg How do you like the Strike Eagle? Been thinking about one for a hunting rifle this year. I think it would be great for a hunting optic since it's a Second Focal Plane scope. I will also be looking to get one of those 1.5-8 Razor HD LH scopes for a lightweight 14.5" 6.5 Grendel build I keep running around in my head. |
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I am a KAC addict. If you're selling something from them, please email me.
AR-15 Armorer Instructor S&W M&P Armorer |
I just wanted to check before I started buying parts. If you have a Troy front sight and attach the CMR picatinny rail to the 3'clock position, will a Surefire M300C in a Gearsector scout mount have enough room to fit?
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I see the new rail has a larger inside diameter, I wonder can you use normal gas blocks now? Stickman can you give some insight?
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"Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws." - Plato
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Originally Posted By Stickman:
I'm not sure what the "normal" gas block size would be, so I can't give a good answer. Sorry. View Quote View All Quotes View All Quotes Originally Posted By Stickman:
Originally Posted By TATBME:
I see the new rail has a larger inside diameter, I wonder can you use normal gas blocks now? Stickman can you give some insight? I'm not sure what the "normal" gas block size would be, so I can't give a good answer. Sorry. None super lo pro, well specifically a Geissele. |
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"Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws." - Plato
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