If your firearm doesn't already have a 1913 attachment rail on the rear choose the appropriate adapter above! Skeleton Stock 8-inch Rise with JMAC's 1913 folding mech - not assembled 2x Integrated QD Sling Socket 8" Length 0.275" Cheek Rise Drilled and tapped for optional cheek risers - will be available in the future 7075 T6 Aluminum Hard-Coat Anodized Only 5.39oz without folding Mech JMAC 1913 Folding Mechanism Mfg: Jmac Customs