BCMGUNFIGHTER STOCK KIT MOD1 SOPMOD BLCKStock Kit Mod 1 Black - Widebody Compartment - More Pronounced Cheekweld - SnagFree Design - Modular Vehicle Borne Operations Sling Tab - 2 Types of Ambidextrous Sling Mounting Options - Storage compartment located in toe of stockus Sling Mounting Options - Storage compartment located in toe of stock