BCM Stock Kit w/ Mod 2 stock and MK2 RMS INCLUDES: BCM Stock Mod 2 - Black BCM MK2 Receiver Extension (approximately 3/4" longer than carbine), 7076T6, 8 position, Mil-Spec diameter Mil-Spec M16A4 Rifle Action Spring BCM MK2 Mod 1 - T0 Buffer (weight = approximately 3.8oz) BCM EPM4 End Plate (include mount for QD swivel) Locking Nut (Castle Nut) M4 FIT LIKE A GLOVE, BUILT LIKE A TANK Made by Americans in Hartland, WI - the BCMA(R) Mod 2 stock is an improvement over the baseline M4 accessory with enhanced ergonomics, and next-level durability. Recontoured into a patented (United States Patent Number: D901616) semi-club Mfg: Bravo Company