
Availability: In Stock
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.
| Barrel Length | 6 inches |
| Caliber | .22 LR |
| Twist Rate | 1:16 inches |
| Thread Pattern | .5" x 28 threads |
| Crown Style | 11-degree target crown |
| Weight | 9.5 oz |
| Finish | Matte Olive Drab (ODG) |
| Material (Barrel/Receiver) | Lightweight aluminum with stainless steel breech face |
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.
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.
The PAC-LITE IV is chambered in .22 LR. The 1:16-inch twist rate is optimized for standard .22 LR ammunition.
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.

SKU: 121686021 • Weight: 0.97oz





Availability: In Stock
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.
| Barrel Length | 6 inches |
| Caliber | .22 LR |
| Twist Rate | 1:16 inches |
| Thread Pattern | .5" x 28 threads |
| Crown Style | 11-degree target crown |
| Weight | 9.5 oz |
| Finish | Matte Olive Drab (ODG) |
| Material (Barrel/Receiver) | Lightweight aluminum with stainless steel breech face |
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.
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.
The PAC-LITE IV is chambered in .22 LR. The 1:16-inch twist rate is optimized for standard .22 LR ammunition.
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.
SKU: 121686021 • Weight: 0.97oz
