Description
The Centurion patented C4 rail system is a lightweight, rugged, 2 piece free float rail that when installed gives the uppers a continuous 12o’clock rail. The C4 system is the lightest and most rigid rail that clamps to a standard barrel nut on all AR15, M4, and M16 type weapons systems. This design allows the installation of the rail on an upper assembly without removing the front sight post or permanently attached muzzle devices.
Fits MIL-Spec uppers. Many billet uppers will not accept the alignment tabs without modification. Any modification will make the rail ineligible for return.
**Please note that some FSBs may need to be modified to fit by filing down the longer sling attachment ears so that they are not touching the handguard
*** We recommend gunsmith installation for all of our parts. We cannot warranty items damaged by improper installation.
Features
Material: 6061 T6
Finish: : type 3 hard coat anodized
Weight: 14.2oz with screws—1.1oz with standard barrel nut
Length: 12.56in (pocket located for carbine length front sight post)
Width: 2.1in
Height: Install 1.978in / end of rail 2.326in
Inside diameter: 1.37
Rails: 1913 spec rail
Fasteners: grade 8 bolts phosphate finished
MADE IN USA
***Please Note***
– Screws are included with the purchase of all rail systems and replacement screws are available to purchase if necessary
– Barrel Nut and Alignment Pin included
– Hex wrenches/keys are not included but installation will require 9/64″ and 3/32″ SAE Hex Keys
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