Designed in partnership with Unity Tactical, the SB Tactical SB22 Modular Chassis Kit is a lightweight, modular chassis for the Ruger 22 Charger , Ruger 10/22, and its clones. Able to accept M1913-compatible braces and stocks, the SB22 Fixed Kit is the key component to the perfect pack gun. FeaturesLightweight, polymer chassis with aluminum insert, Picatinny (M1913) rear, and integral, ambidextrous QD sling socketAccepts standard AR-15 pistol grips (Reptilia CQG Grip included)Includes Picatinny (M1913) Bridge Mount and Flat Top Cover Kit IncludesPolymer ChassisReptilia CQG GripPicatinny (M1913) Bridge MountFlat Top Cover