The Tactical Solutions Pac-Lite IV is a lightweight upgrade designed to replace the factory upper on Ruger’4 Mark IV and Mark IV 22/45 pistols. It combines an aluminum barrel and receiver with a stainless-steel breech face to reduce weight while maintaining durability and reliable function. The Pac-Lite IV is offered here in a fluted, threaded 4.5″ barrel length finished in black and is drilled and tapped for Pac-Lite scope bases. Installation is intended to be straightforward on the existing Mark IV frame.
Key Specifications
- The caliber is .22 LR.
- The model is the Pac-Lite IV.
- The primary barrel and receiver material is Aluminum.
- The breech face and receiver feature stainless steel components.
- The finish/color is Black.
- The barrel type is Fluted/Threaded.
- The barrel length is 4.5″.
- The twist rate is 1:16″.
- The muzzle threads are 1/2″-28 threads.
- The barrel uses an 11-degree target crown.
- The listed weight is 8.5 oz.
The Pac-Lite IV provides a practical, turn-key upgrade for shooters seeking a lighter, accurately-oriented barrel and receiver package for Ruger Mark IV and 22/45 pistols. Its combination of aluminum construction, stainless-steel breech face, threaded and fluted profile, and target crown make it a sensible choice for shooters prioritizing balanced handling and consistent .22 LR performance.
