This is the Arisaka M-LOK hand stop.

Constructed from durable steel and featuring an anodized finish, this hand stop is ready to handle any task at hand. It can help improve your control, recoil management, and even be used as a barricade stop.

This hand stop enhances your rifle’s functionality and its aesthetics – win-win.

Includes everything you need to install: two M-Lok nuts and two 10-24×5/16″ Torx button head screws