B5 Systems RCM-1257 M-LOK Rail Cover Flat Dark Earth 4-Pack

The B5 Systems RCM-1257 M-LOK Rail Cover is a low-profile, 4-pack of polymer rail panels designed to fill exposed M-LOK slots on modern sporting rifle handguards. Each cover spans 3 M-LOK sections, giving shooters a clean, snag-free gripping surface along the handguard while also protecting unused M-LOK slots from debris and damage.

Manufactured from a soft, non-slip, heat and chemical resistant polymer with a ribbed texture, these covers improve weapon control and ergonomics during use. The press-in fit design allows quick, tool-free installation and removal, so users can configure coverage dynamically based on accessory placement. The covers are finished in Matte Flat Dark Earth to match popular FDE rifles and accessories.

Designed to fit most machined and polymer M-LOK handguards on AR-15 and AR-10 platforms, each cover measures 4.6 inches long by 0.63 inches wide and weighs only 0.15 oz. The pack of four provides complete coverage for a typical carbine-length handguard or selective coverage of a longer handguard.

Your purchase includes one 4-pack of B5 Systems M-LOK Rail Covers in Flat Dark Earth.