The Tactical Solutions� PAC-LITE pistol barrel is a lightweight and accurate .22 LR barrel and receiver for the Ruger Mark I II or III and Ruger 22/45 pistol. The Pac-Lite upgrade represents what TacSol is known for in the .22LR aftermarket barrel industry; lightweight highly accurate and easy-to-install barrels. This barrel dramatically increases accuracy performance and reliability. The 1� outside diameter of the threaded barrel is designed to shoot and look great with or without attachment of a suppressor or compensator. Suppressors are easily attached by simply twisting them on the barrel�s threaded end. Hand-chambered for 22 LR with a target crown and chromoly bore the PAC-LITE replacement barrel upgrade is everything you could ask for in a pistol barrel. - Shoot with Accuracy: The barrel�s innovative chromoly steel bore and target crown provide pinpoint accuracy - Quick and Easy Target Acquisition: Lightweight durable construction - Noticeable Craftsmanship: Unique design & quality above all others - Choice of Barrel Length: Choose between 4.5� and 6� barrels - Choice of Barrel Style: Fluted or non-fluted barrel your choice - Colorful Options: Several color options to fit your individual choice - Easy to Install: Internet video instructions no gunsmithing needed - Easy to carry: Extremely lightweight and durable materials - Easy Optics Attachment: Drilled and tapped for easy Scope Rail attachment - Easy Silencer or Compensator Attachment: Threaded muzzle for thread-on silencer or compensator - Smooth Cycling: Innovative bolt creates extremely smooth shooting - Versatile Use: Perfect for hunting plinking and target shooting - Pinpoint Sight System: Comes standard with ramped front sight - SPECS - Milled from 6061-T6 Aluminum - Weight: 8.6 Ounces - 1 in 16� twist - Target crown - 1.00� Target Diameter Barrel - Threaded � X 28 for the addition of a silencer or compensator - Chromoly steel bore - Drilled and tapped for the addition of an optic rail