"The M4-VEPR SB Shock-Absorbing Buttstock System replaces the MOLOT VEPR OEM stock with an M16/M4 collapsible and side folding stock with an all metal adaptor. Advantages: Silicon-chrome alloy spring based Shock-Absorbing mechanism reduces recoil, improves accuracy and ""on-target"" time during rapid fire Non slip design provides superior shoulder positioning enhancing tactical performance Ultra-rugged design, all metal adaptor with fiberglass reinforced polymer buttstock COM-SPEC 6061 T6 hard anodized aluminum buffer tube Built-in sealed 2 AA OR CR123 batteries compartment Includes preset ambidextrous sockets to accommodate our SLS QD Sling Swivels Replaces the original buttstock and operates with the original left  folding mechanism Available in black, olive drab green or desert tanCompatibility: MOLOT VEPR 12 "