Photo of the Day: Centurion Arms CMR 12-inch Rail

Tim checks out Centurion Arms’ brand new, lightweight and narrow diameter CMR 12-inch tubular rail.

Centurion Arms has developed its latest hand guard system for the AR platform for 5.56mm and 7.62mm rifles. Boasting an extremely narrow diameter, it is approximately .120″ narrower in diameter (side to side) than a Troy Industries VTAC rail. The lightweight, custom barrel nut can be installed with a standard adjustable pin spanner wrench. Rather than attach sections of picatinny rail to the hand guard, Centurion Arms will be releasing mounts that will screw directly into the hand guard eliminating the need for an intermediate interface. The mount system is a hybrid design. It borrows the concept of the locking cross bolt system found in the H&K 416 and combines it with a clamp to the barrel nut. The tolerances are held tight and the hand guard is about a slip fit on the barrel nut prior to tightening. The mount mechanism is rock solid. As with all Centurion Arms hand guards, there are integral sling swivel attachment points at the front and rear at 9 and 3 o’clock. The entire rail is cleanly machined, extremely ergonomic, and attractive to boot. They should be hitting the market at any moment so look for it at your favorite dealer.


Edited to add weights:

CMR 12-inch with barrel nut and screws: 10.7 ounces

CMR 14-inch with barrel nut and screws: 11.6 ounces

This entry was posted in AR15/M4, Long Guns, Photo of the Day, Weapon Modifications and tagged , by Tim Lau. Bookmark the permalink.

About Tim Lau

Tim Lau has over a decade of experience as an end user, armorer and instructor. He has worked for several well known firearms training organizations, and holds multiple firearms instructor certifications. He owns and operates 10-8 Consulting, LLC, which provides industry consulting services as well as marksmanship and specialized firearms training to qualified civilian, law enforcement and military personnel.

6 thoughts on “Photo of the Day: Centurion Arms CMR 12-inch Rail

  1. Interesting. I run a 13″ VTAC Alpha today (on a 14,5″ upper) and I’m very happy with it. What’s the weight of the CMR 12″?

    • The CMR 12-inch rail weighs 10.7 ounces including the screws and barrel nut. The 14-inch rail weighs 11.6 ounces. By comparison, the Troy/VTAC Alpha 11-inch rail weighs 11.2 ounces and the 13-inch weighs 12.6 ounces.

      The weight is in the screws and barrel nut when it comes to the CMR. The CMR barrel nut is longer and has more bearing surface than the Troy barrel nut.

  2. I saw the prototype at SHOT and have been waiting anxiously for the arrival of this rail. This rail and one of Centurion’s barrels will be the basis of my next 5.56mm rifle.

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