Centurion Arms 5.56 KeyMod™ CMR 13 Inch

MSRP: $249.00
Your Price: $195.00
(You save $54.00 )
(2 reviews) Write a Review
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Out of stock

Centurion KeyMod™ CMR 13in


Our patented 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 5.56/.223 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.


Material: 6061 T6

Finish: Type III hard coat anodized

Weight: 13in-10.3oz with barrel nut and hardware

15in-11.1oz with barrel nut and hardware

Length: 13in (13.468 )

15in (15.044 )

Width: 1.39(body of tube) 1.75 (at QD sling swivels)

Height: 1.910(body of tube)

Inside diameter: 1.230

Rails: 1913 spec rail on top

Integrated QD Attachment sockets - Limited Movement



- Centurion Arms only guarantees their gas block fits under the CMR. This is due to the CMR's extreme low profile. Bravo Company USA Inc, however has used the BCM® Low Profile Gas Block without issue.

- Screws and proprietary barrel nuts are included with the purchase of all rail systems. Replacement screws and barrel nuts are available to purchase directly from Centurion Arms if necessary.

***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit www.p65warnings.ca.gov.***

2 Reviews

Write a Review
  • 5
    Great rail

    Posted by Christopher Geist on Sep 22nd 2016

    Awesome light weight rail, i tried to use a different rail on every build, just so they all look kinda different.Win on this one, as well as my Kmr 13" and carious other

  • 5
    Centurion Arms 5.56 KeyMod car 13 inch

    Posted by richard on Sep 22nd 2016

    Excellent product, easy to install. True enhancement to rifle ergonomics with additional benefits of weight reduction and extra rail space.