The r10/22 m4 collapsible stock conversion kit presents a high quality and ability enhancing tactical upgrade for the ruger 10/22.This unique stock offers the perfect combination of a classic bench-rest design with a modern tactical versatility and buttstock features.It features 1913 mil-std picatinny side and lower rails built-in adjustable cheek-rest with 5 height options and a quick-detach sling swivel sockets on both sides.The stock is made of fiberglass reinforced polymer with an ergonomic design and left side folding ability for compact carry and storage.Firearm Model: Ruger 10/22Material: PolymerFinish: BlackLength Of Pull: 13.11"-15.94"