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.
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: 2.38in
Inside diameter: 1.37
Rails: 1913 spec rail
Fasteners: grade 8 bolts phosphate finished
MADE IN USA
Please NOTE:
Barrel Nut Sold Separately.
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.
Review by Chad D. on 30 Aug 2024review stating Instalation was easy fit and
Instalation was easy fit and finish was great. I would recommend this rail to anybody looking to upgrade their AR solid piece of kit way better with it being extended for other exsesories.
Review by Mike W. on 2 Nov 2022review stating Centurion C4 FSP 12.0
Worked well on my LE6920 I was trying to keep somewhat original. I did have to cut the front handguard retainer with a tin snips because I didn't want to deal with trying to punch out the taper pins on the FSB. Rock solid rail.
Review by Chad D. on 30 Aug 2024review stating Instalation was easy fit and
Instalation was easy fit and finish was great. I would recommend this rail to anybody looking to upgrade their AR solid piece of kit way better with it being extended for other exsesories.
Review by Mike W. on 2 Nov 2022review stating Centurion C4 FSP 12.0
Worked well on my LE6920 I was trying to keep somewhat original. I did have to cut the front handguard retainer with a tin snips because I didn't want to deal with trying to punch out the taper pins on the FSB. Rock solid rail.
