This is a Midwest Industries Hand Stop known as the Barricade Stop, model MI-MBS.
Midwest Industries is a proven leader in the firearm industry. Made in America" focusing on the small details to make your rifle platform better. The addition of their M-Lok Barricade Stop will give you the added function of a handstop and barricade stop. It mounts to M-LOK system slots and features teeth that allow user to achieve a solid anchor point tor precise shots.
Features:
Features teeth that allow user to achieve a solid anchor point tor precise shots
Constructed from 6061 aluminum hard coat anodized