This is a Magpul Industries Hand Stop known as the M-LOK Hand Stop Kit, model MAG608-GRY.
The M-LOK Hand Stop Kit serves as a light weight" low-profile M-LOK slot index point for improved weapon control" or as a forward stop to prevent the shooter's hand from reaching the hot front sight assembly or muzzle. The kit includes one M-LOK Hand Stop" one M-LOK Index Panel" and one M-LOK Rail Cover Type 2 for the individual user to configure their kit as they desire. Also included in this kit is an adapter for use with Magpul M-LOK equipped polymer Hand Guards/Forends as well as other wider profile aluminum hand guards. Made in U.S.A.
Features:
Low-profile M-LOK slot index point for improved weapon control
Aggressive TSP Texture
Prevents the shooter’s hand from reaching the muzzle
