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Centurion Arms

Centurion CMR 7.62 / .308 Rail System - 12

Centurion CMR 7.62 / .308 Rail System - 12

Availability: In stock




Our patent-pending CMR rail system is a lightweight, rugged, one piece, free float hand guard that, when installed, gives the upper a continuous 12 o'clock rail. The CMR system clamps to a proprietary barrel nut that can be installed on 7.62/.308 based AR platform systems. It was designed with the top 1913 rail for mounting the most common accessories, yet does away with the need for 1913 rail at the 3, 6, and 9 o'clock positions. Here, other accessories can be directly mounted to it with a dedicated, simple, light-weight, mount. However, it does allow for 1913 rail to be added, if needed, for some less common accessories. Additionally, we built in anti-rotation QD sling swivels in 4 positions. The main objective was to have a smaller, lighter weight, more ergonomic, hand guard that maintains or enhances functionality for the end user. As professional end users ourselves, we know the importance of keeping things simple and that was our design intent here... a K.I.S.S. (keep it simple, stupid) system.


  • DPMS High Rail Pattern
  • Material: 6061 T6
  • Finish: Type III hard coat anodized
  • Integrated QD Attachment sockets - Limited Movement
  • Weight: 14.8 oz with barrel nut
  • Length: 12.56"
  • Width: 1.73" (body of tube) 1.938" (at QD Sling Swivels)
  • Height: 2.173"
  • Inside Diameter: 1.25"
  • Rails: 1913 spec rail on top

Additional Info

Additional Info

SKU CMR:701112
Manufacturer Centurion Arms
Finish Black
Barrel Length No
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


Customer Reviews (4)

Great Rail for large frame AR.Review by
I really like this rail. It feels like high quality in my hands and fit my Mega Maten build without much hassle. My SLR Sentry 7 clamp on gas block also fit with a tiny amount of clearance on the bottom. A set screw version would have about 1mm of extra clearance. It is a very low profile rail, keep in mind.

I especially liked the fact that you can purchase an inexpensive accessory kit, which I did, and pretty much cover 99% of your mounting needs without having to buy individual keymod or mlok attachments. Usually a proprietary system costs you more money, but the CMR kit (which includes a surefire scout light mount!) actually saved me some money.

The only real con to this rail is that it does not include instructions of any kind, although installation is pretty self explanatory; there are no torque specs to go on and a wrench for the nut isn't included. Luckily, Centurion CS is great and respond quickly to questions and are extremely helpful. They also sent me a prototype wrench which made installation easy, since I didn't have the proper armorers wrench or spanner wrench handy.
(Posted on 2/6/2017)
Rated "Good"Review by
Rail itself is good. Quality machining, very good appearance and finish. Barrel nut had to be honed to fit my barrel. :( Does not come with installation tool so no five stars . . . ended up tightening barrel nut with a pipe wrench! (Sad, but true!) Handguard feels good in hand. Have not fired the weapon as of yet. Hoping for good results after some use. (Posted on 10/9/2016)
No commentReview by
Great quality rail and promt service# (Posted on 8/17/2016)
No commentReview by
- (Posted on 7/29/2016)

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