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.