Shop › LUTH AR MBA-2 STOCK KIT 308 BLK LUTH AR MBA-2 STOCK KIT 308 BLK $108.05 Luth-AR MBA-2 Stock With Buffer Assembly, A2 Extension Tube, Standard Buffer, .308 Buffer Spring, Fixed, Black MBA-2K308 Quantity: Add To Cart Added! Luth-AR MBA-2 Stock With Buffer Assembly, A2 Extension Tube, Standard Buffer, .308 Buffer Spring, Fixed, Black MBA-2K308