The Tactical Solutions Pac-Lite is a .22 LR semi-auto pistol barrel assembly built from aluminum with a black finish and a 4.5-inch barrel. It fits Mark I, II, III, and 22/45 frames, making it a drop-in replacement for Ruger shooters who want to upgrade or swap configurations. 
 

Key Specifications 

• Brand: Tactical Solutions 
• Model: Pac-Lite 
• Caliber: .22 LR 
• Barrel Length: 4.5 inches 
• Finish: Black 
• Material: Aluminum 
• Threads: 1/2"x28 
• Fit Models: Mark I, II, III, and 22/45 
• Included Accessories: Thread Protector (End Cap) 
• Condition: New in Box 
   

Detailed Features 

The barrel is threaded 1/2"x28, so suppressors and muzzle devices attach directly. A thread protector ships in the box. The top of the barrel is drilled and tapped for Pac-Lite scope bases, which lets you mount optics without a separate rail adapter. The aluminum construction keeps weight down without sacrificing rigidity.

Owners of the Tactical Solutions Pac-Lite .22LR 4.5" Black Aluminum are generally satisfied, with a few specific criticisms that come up regularly.

The light weight gets mentioned most often as a practical advantage — the aluminum keeps the gun easy to carry through a full range session. Accuracy for a .22 LR is well-regarded; users running it for target practice and training find it consistent. The ability to mount optics and suppressors via the threaded barrel and drilled-and-tapped top is a genuine draw for owners who want to configure the gun beyond stock.

Ammo sensitivity is the main complaint. Some users report feeding or ejection hiccups with certain brands of .22 LR, though the issues tend to disappear with higher-quality ammunition. A few shooters also note that as a .22, it has clear limits for self-defense compared to centerfire options — a reasonable and expected tradeoff at this caliber. Overall the Pac-Lite is well-liked as a training and plinking setup for Ruger Mark-series owners.