Centurion Arms C4 12" Carbine-Length A2 FSB Rail System
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The patent pending C4 rail system is a lightweight, rugged, 2 piece free float rail that when installed gives the uppers a continuous 12o’clock rail. Fits carbine length gas systems. 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. The design allows the installation of the rail on an upper assembly without removing the front sight post or permanently attached muzzle devices.
More info below.
• Material: 6061 T6
• Finish: : type 3 hard coat anodized
• Weight: 14.2oz with screws---1.1oz with standard barrel nut
• Length: 12in
• Width: 2.1in
• Height: 2.38
• Inside diameter: 1.37
• Rails: 1913 spec rail with proper T-marks
• Fasteners: grade 8 bolts phosphate finished
• MADE IN USA