**Pricing does not include barrel nut. Please add barrel nut to cart separately if desired.
 
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.
 
**Please Note: Current version of the rail has some slight cosmetic differences from stock photos. Engraving is now machine engraved and black anodized....no white markings.
 
Features
Material: 6061 T6
Finish: : type 3 hard coat anodized
Rails: 1913 spec rail
Fasteners: grade 8 bolts phosphate finished
MADE IN USA

Specifications:

7 inch
Weight: 8.7oz with screws---1.1oz with standard barrel nut
Length: 7.3in
Width: 2.1in
Height: 2.38
Inside diameter: 1.37
 
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: 1.37
 
10 inch
Weight: 10.7oz with screws---1.1oz with standard barrel nut
Length: 10in
Width: 2.1in
Height: 2.38
Inside diameter: 1.37
 
12 inch
 Weight: 14.2oz with screws---1.1oz with standard barrel nut
Length: 12.565in
Width: 2.1in
Height: 2.38
Inside diameter: 1.37