The Bravo Company BCMGUNFIGHTER Mod 1 SOPMOD Compartment Stock Kit has a more pronounced cheek weld and a snag free design stock. No sharp edges 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.Longer overall length to fit longer "MilSpec" diameter AR10/A5/Intermediate receiver extensions.Storage compartment located in the toe of the stock, accessible through butt pad.Two different ambidextrous sling mounting options, including QD swivel sockets.Built in rubber butt pad for secure shoulder placement.Kit includesBCM 7075T6 Mil-Spec Receiver Extension,Locking Nut M4 (Castle),Mil-Spec Carbine Action Spring,Carbine Buffer,BCM QD Swivel Mount End Plate