The Magpul M-LOK Thumb Shelf in black (brand part no. MAG1566-BLK) is a compact grip accessory that mounts directly into any M-LOK slot to give the support hand a defined thumb rest. Magpul designed the Thumb Shelf for shooters who run a thumb-over-bore or high-hand grip on an M-LOK-equipped handguard and want a small, tactile reference point rather than a full vertical or angled foregrip. It installs with no tools beyond the M-LOK hardware already in hand, adding grip control without meaningfully changing the handguard’s profile.

Key Specifications

• Mounts directly into any standard M-LOK slot.
• Adds a defined thumb rest for a thumb-over-bore or high-hand grip.
• Finished in black to match most factory handguards.
• Adds grip control without changing the handguard’s overall profile.
• A genuine Magpul Industries part, built to the same tolerances as their broader M-LOK accessory line.

Frequently Asked Questions

What mounting system does this use? It mounts directly into any standard M-LOK slot.

What is a thumb shelf used for? It gives the support hand a defined thumb rest for shooters who run a thumb-over-bore or high-hand grip.

Buy the Magpul M-LOK Thumb Shelf

Shooters who want a more defined support-hand grip reference on an M-LOK handguard without adding a full foregrip will get exactly that with this compact Magpul shelf. Order it through our Lubbock, Texas gun shop and browse more rifle accessories and parts from Magpul Industries and other trusted brands.