The B5 Systems M-LOK Rail Cover (B5 Systems part no. RCM-1257) in FDE comes as a 4-pack, with each cover using a simple press-in fit to fill 3 M-LOK slots at a time. Covering unused M-LOK sections protects your hand from a hot rail after firing and gives your handguard a cleaner, more finished look. Since each piece snaps in without screws or tools, you can rearrange or remove them any time you add a light, grip, or other M-LOK accessory. Finished in FDE, this 4-pack is built specifically for AR-15 M-LOK handguards.

Key Specifications

• Press-in fit installation requires no screws or tools.
• Each cover fills 3 M-LOK sections for efficient rail coverage.
• 4-pack quantity covers multiple rail sections in one purchase.
• FDE finish matches common Flat Dark Earth builds.
• AR-15 compatible for standard M-LOK handguards.
• M-LOK-specific design is built exclusively for M-LOK slot systems.

Frequently Asked Questions

How many M-LOK sections does each cover fill? Each cover fills 3 M-LOK sections.

Do these require tools to install? No, they use a simple press-in fit with no screws or tools needed.

Buy the B5 Systems M-LOK Rail Cover 4-Pack

Order the B5 Systems Rail Cover M-LOK 4-Pack in FDE from our Lubbock, Texas gun shop for fast shipping. It’s a clean, tool-free way to cover unused rail space, and a handy addition to our gun accessories selection.