BCM MK2 RECOIL MITIGATION MOD1 T0 UPC: 812526023100

This kit contains all the necessary parts to mount to your Mil-Spec dimension stock assembly to your Mil-Spec lower receiver: MK2 Mod 1 - T0 Buffer (weight = approximately 3.8oz) Mil-Spec M16A4 rifle action spring Mk2 Receiver Extension (approximately 3/4'' longer than carbine), 7076T6, 8 position, Mil-Spec diameter Lock Nut (Castle) M4 Receiver QD End Plate (include mount for QD swivel)