"Clubfoot"-style adjustable stock with modular storage options gives the tactical shooter exceptional versatility and weapon control. The EMOD is 1A 1/2 " longer than the original Modstock to ensure a solid, comfortable cheekweld even on rifles with long eye relief scopes. Two, detachable, full-length storage compartments provide additional cheek support for more comfort and stability. Each waterproof compartment holds up to 3 AA or 4 CR123 batteries, and a permanent flip-open compartment on the left side of the stock holds two more AA batteries or other small items. Extra-length buttplate with removable rubber pad angles forward from heel to toe for a better hold in t Mfg: Vltor Weapon Systems SPECS: Molded polymer, black or flat dark earth. 7A 3/4" (19.7cm) long. Basic EMOD Kit includes buttstock and two (2) detachable storage compartments. Mil-Spec fits 1.14" O.D. carbine buffer tubes only. Commercial fits larger, 1.17" O.D. commercial buffer tubes.