TACSOL PAC-LITE IV Ruger MKIV 22LR 6" ODG Fluted Barrel

The Tactical Solutions PAC-LITE IV barrel upgrade for Ruger Mark IV 22LR gives your .22 pistol a serious refresh without breaking the bank or requiring a gunsmith. If you're running a stock Mark IV or Mark IV 22/45 and want to trim weight, sharpen accuracy, and improve how the gun points naturally, this 6-inch fluted barrel in Matte Olive Drab delivers real gains. Shooters upgrading to the PAC-LITE IV consistently report tighter groups and a better balance that makes follow-up shots faster and more instinctive—whether you're punching holes at the range or running .22 drills for training.

Installation is straightforward. This is a bolt-in upper replacement that doesn't demand gunsmith work; you can swap it in your own shop without special tools. The 6-inch length gives you genuine sight radius for precision work while keeping the overall package manageable. The fluted, lightweight aluminum construction shaves ounces compared to factory iron, and the stainless steel breech face and receiver components are built to handle continuous rimfire shooting without premature wear.

The 1:16-inch twist rate stabilizes standard .22 LR ammunition reliably, and the 11-degree target crown is cut to support accuracy. The Matte OD Green finish looks tactical and pairs well with modern pistol setups; it's also durable enough for hard use without showing every fingerprint. Whether you're setting up a dedicated rimfire trainer, building a pistol for competition, or just want your Mark IV to shoot and feel like a significantly better gun, the PAC-LITE IV is a practical upgrade that works.

Key Features

• Drop-in upper replacement for Ruger Mark IV and Mark IV 22/45—no gunsmith required
• Lightweight aluminum barrel and receiver construction for reduced weight and improved balance
• Fluted barrel design enhances cooling and contributes to overall weight savings
• Stainless steel breech face and receiver for durability and reliability
• 11-degree target crown optimized for accuracy
• Matte Olive Drab finish with professional appearance
• 6-inch barrel length provides excellent sight radius for precision shooting

Specifications

Frequently Asked Questions

Will this barrel fit my Ruger Mark IV 22/45?

Yes, the PAC-LITE IV is designed as a drop-in upper replacement for both the Ruger Mark IV and the Mark IV 22/45. Installation does not require a gunsmith.

Does this come with everything I need to install it?

The PAC-LITE IV is an upper assembly replacement. Installation involves swapping your factory upper for this unit on your existing frame. Consult the manufacturer's instructions for your specific Mark IV model to confirm all parts needed for installation.

What ammunition does this shoot?

The PAC-LITE IV is chambered in .22 LR. The 1:16-inch twist rate is optimized for standard .22 LR ammunition.

How much weight does this save compared to the factory barrel?

The PAC-LITE IV assembly weighs 9.5 ounces. For a direct weight comparison with your current Mark IV configuration, weigh your factory upper and compare the difference.