The BCMGUNFIGHTER™ Stocks are a series of drop-in replacement stocks for the M4 Carbine, built to be lighter and more durable than the base equipment. Using a patented* internal latch system, the Stock features an ambidextrous QD interface port, a web sling attachment slot, a built-in buttpad and the VBOS(Vehicle Borne Operations Sling) Tab, for securing a sling while not worn on body. The stocks are available with either a minimalist(Mod 0) or more pronounced cheek weld(Mod 0 SOPMOD). * United States Patent Number: 9,109,855