The Bravo Company BCMGUNFIGHTER Mod 0 Stock Kit has a snag free design with no sharp edges stock to prevent tangling of the rifle with the shooter's sling, molle gear, or other kit. FeaturesModular VBOST (Vehicle Borne Operations Sling Tab) This tab interfaces with the shooter's riggers' band or bungee to secure the shooter's sling against the stock when the carbine is not in use. Increasingly, this is the most common application when operating inside a vehicle. 2 different types of ambidextrous sling mounting options, including QD swivel sockets.Simple modular design. 5 parts, and 1 screw allow for modular adaption of future stock options and configurations. Kit includes:BCMA(R) 7075T6 Mil-Spec Receiver Extension,Locking Nut M4 (Castle),Mil-Spec Carbine Action Spring,Carbine Buffer,BCMA(R) QD Swivel Mount End Plate.