The B5 Systems M-LOK Rail Covers (part no. RCM-1256) press directly into open M-LOK slots to turn exposed rail into a comfortable, grippy gripping surface. B5 Systems molds each cover from a soft, non-slip material with subtle ribbing that adds real traction under a support hand, while also insulating against heat transfer from a hot barrel or handguard. Sold as a pack of four, they’re a fast, no-tool way to cover unused rail space in black.

Key Specifications

• Press directly into open M-LOK slots with no tools required.
• Molded from a soft, non-slip material with subtle ribbing for grip.
• Provides heat resistance, insulating your hand from a hot handguard.
• Also offers chemical resistance for durability under field use.
• Sold as a 4-pack to cover multiple open rail sections.
• Finished in black.
• Ships at 0.099 lb, adding almost nothing to your order.
• Also available in B5’s other standard color options, so this black set can match or contrast your build.

Frequently Asked Questions

What rail systems do these covers fit? Any standard M-LOK slot on a compatible handguard or forend.

How many covers are included? Four per pack.

Do these covers require tools to install? No, they press directly into open M-LOK slots.

Buy the B5 Systems M-LOK Rail Covers

Bare M-LOK slots are sharp on a support hand and do nothing for grip, and these covers fix both in a few seconds per slot. Order it from our Lubbock, Texas gun shop for fast shipping, along with more M-LOK rail accessories.