AA556R Easily installed on your Ruger 10/22 the ARCHANGEL AA556R adjustable 6-position stock features a drop-in fit that requires no gunsmithing. Proprietary carbon fiber filled polymer construction will ensure a lifetime of hard use. Makes your Ruger 10/22 mimic the look and feel of an M-4 carbine. It has a 6-position buttstock and 4 quick detach sling swivel hard points. There is a full length top picatinny rail and a 6 O'clock Picatinny rail on the forend. The forend sides are slotted for the addition of optional Picatinny rails and the collapsible M4 style stock adjusts from 7 to 11 inches length of pull. Includes an extended magazine release. Features: Ergonomic pistol grip with finger grooves Muzzle attachment allows attachment of gas block height sights on OEM barrels Includes extended mag release