The FAB Defense M4 Precision Stock PRO Conversion Kit presents a high quality and ability enhancing 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. FeaturesVentilated 6061 T6 Billet aluminum Handguard and upper rails1913 MIL-STD Picatinny upper, sides and lower railsAllow secure mounting of any picatinny based optics and accessoriesQuick and easy drop-in installationCollapsible buttstock system with 5 length optionsSide folding buttstock (left folding by default) for compact carry and storageQuick-Detach sling swivel sockets on both sidesErgonomic design prevents wrist fatigue and ensures secure gripFinger grooves and backstrap shape improves trigger operationDurable and lightweight fiberglass reinforced polymer construction