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.
Specifications:
7 inch
Weight: 8.7oz with screws---1.1oz with standard barrel nut
Length: 7.8in
Width: 2.1in
Height: 2.38
Inside diameter: Install 1.984in / end rail 2.366in
9 inch
Weight: 10.6oz with screws---1.1oz with standard barrel nut
Length: 9.25" in
Width: 2.1in
Height: 2.38
Inside diameter: Install 1.977in / End rail 2.330in
10 inch
Weight: 10.7oz with screws---1.1oz with standard barrel nut
Length: 10in
Width: 2.1in
Height: Install 1.981in / end rail 2.341in
Inside diameter: 1.37
12 inch
Weight: 14.3oz with screws---1.1oz with standard barrel nut
Length: 12.16in
Width: 2.1in
Height: Install 2.005in / end rail 2.314in
Inside diameter: 1.37
***Please Note***
- Screws are included with the purchase of all rail systems and replacement screws are available to purchase if necessary
- Hex wrenches/keys are not included but installation will require 9/64" and 3/32" SAE Hex Keys
*** We recommend gunsmith installation for all of our parts. We cannot warranty items damaged by improper installation.
Custom Cerakote Disclaimer:
Custom Cerakote is completed per order. Our Cerakote room runs one color at a time so your ship date will be subject to the color rotation at the time the order is placed. You will receive an email confirmation once the item has actually been packaged to ship.
Cerakote items are not guaranteed to match separate batches or Cerakote completed by outside parties. While we strive to keep our mix uniformed for our own products, we can't say for certain what Walter and Jesse cooked up in their lab out in Albuquerque.
Very solid lockup on a Colt AR15A4. This is my fourth rail from Centurion and I am never disappointed! High quality product!
I am using the 12 inch version on a 14.5 build and its perfect. I like the GI barrel nut interface because it provides a really solid lockup. Fit and finish are superb. This is my second one and won't be my last. Big fan.
It is great except for a gapped milling cut at the base.
Centurion rails are absolute top notch. Great fit and finish. Worked great for my MK12 build.
MK12 Perfection!!! Got rid of my M-LOK Rail and swapped for this 12" C4... Sooo very glad I did. Not only looks appropriate, but is even more functional than my previous.
You cannot miss with Centurion Arms products!