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AR-15/M16 C4 CARBINE CUTOUT RAIL SYSTEM Reviews & Ratings

Two-piece, four-rail handguard installs easily and gives flattop receivers a continuous 12 o’clock rail. Clamps directly to standard barrel nut and features T-marks for proper optic and accessory remounting reference. Machined aluminum construction combines strength with light weight. Carbine Cutout model extends rails ¾" around sides of front sight base on carbine-length gas systems.

SPECS: 6061 T6 aluminum, hardcoat anodized, matte black. 2.1" (5.3cm) wide. 2.38" (6cm) high. 1.37" (3.4cm) inner dia. Includes mounting hardware and instructions.

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Great deal. Okay shipping.

The rails are at the gunsmith, now. Hopefully, all goes well.

by Sam Sumrall on March 26, 2025

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Best drop in rail I've used.

What can I say, it's another top tier piece of kit from Centurion Arms. The fit and finish of this rail is top notch, easily on par with other tier one manufacturers. It full floats your barrel, and has plenty of space for most accessories. Requires some minor gun smithing to install, but worth the effort.

Good stuff

Opened the box and was installed in less then 5 minutes on my Sig M400. Solid, plenty of rail space, and limited rotation QD sockets.