Magazine Well Grip and Magwell Funnel for M16/M4/AR-15 Features:- The MWG converts the magazine well into a comfortable vertical grip for better control of the weapon.- Allows a tight stance for speed and maneuverability.- Prevents pressure on non-free-floating handguards that can affect accuracy. Keeps hands off the magazine.- The MWG also functions as a flared and extended magazine well to speed reloads.- Has a window to view your serial number through.- Fits MIL-SPEC M16, M4 and AR-15 lowers.- MIL-SPEC reinforced polymer.