Centurion Arms 5.56 CMR Gen 1 Rail Handguards


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Full Details & Specifications

Centurion Arms 5.56 CMR Gen 1 Rail Handguards


The Centurion Arms CMR (Centurion Modular Rail) is a lightweight rail system which uses a simple, slick design and proprietary barrel nut. The Centurion CMR rail features 4 built in QD sling swivel sockets with limited rotation on the front and rear, left and right side of the rail. The one-piece extruded aluminum of the CMR makes for an extremely rigid and robut rail system. This is a free floating rail system, which enhances accuracy and allows installation of aiming lasers, optics, and backup sights.

This Gen 1 style CMR uses the latest mounting technology found on the newer model CMRs, but utilizes the rigid and solid construction and internal reinforcing ribs of the original CMR design.

This CMR uses a proprietary mounting system with steel thread inserts along the rail to mount the Centurion CMR accessories (and some from other accessories like the B5 GripStop and products from Arisaka.)

The benefit of the CMR system is users can easily attach CMR specific mounts and accessories to the rail with speed and ease: much simpler than dealing with the backing plates found on M-LOK or Keymod accessories. Centurion has since released both Keymod and M-LOK CMR rails for those with preference for either system. 


  • Material: 6061-T6 Aluminum
  • Finish: Type III Hard Coat Anodized
  • Integrated QD Attachment sockets - Limited Rotation
  • Width: 1.56" (body of tube) 1.75" (at QD sling swivels)
  • Height: 1.995"
  • Inside diameter: 1.12"
  • Rails: 1913 Picactinny spec rail on top


Weight (with barrel nut and mounting hardware)

  • 9.5in - 10.5 ounces
  • 11in - 11.9 ounces
  • 12in - 13.2 ounces
  • 13.5in - 13.9 ounces
  • 14in - 14.2 ounces

Length (Actual overall length)

  • 9.5in (9.418")
  • 11in (10.994")
  • 12in (12.56")
  • 13.5in (13.668")
  • 14in (14.0625”)

Made in USA.

Manufacturer Centurion Arms
Shipping Restriction ITAR/Export Restricted
MSRP $230.00
Weapon Model No
Barrel Rest Free Float
Material 6061-T6 Aluminum
Material Finish Type III Hard Coat Anodized


Customer Reviews

What the customers are saying..

Overall Customer Rating

Based on 1 review(s) (1)

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one of top rails made

Posted by Remmy | (Posted on 8/5/2019)

The CMR gen 1 rail is one of my favorite rails of all time. I like it better than the Geisseles, DD and BCMs even though those are all top tier.
Its not the popular Mlok, but the CMR is just as simple if not easier.
The only downside is CMR is proprietary, Mlok is everywhere.
The CMR accessory kit will handle just about anything you want to add to the rail though, plus the CMR rail covers are the coolest looking ever.


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