Winchester Repeating Arms SXP 12 Gauge 3.5 in Field Shotgun Barrel Black Shadow DR 22 in. S. Army. Together with the patented Power Unit II handguard the new power unit will give you a leg up on pelts and choke tubes allowing you to "tune" your slugger to the optimum operating point. The Power Unit II handguard provides superior strength and longevity for your weapon while the patented Power Unit II handgunning system gives you a straighter bore and consistent chamber alignment so you can "tune" your slugger to the proper setting. Specifications for Winchester Repeating Arms SXP Shotgun Barrel - Black Shadow DR: Manufacturer: Winchester Condition: New Package Contents: Winchester Repeating Arms SXP Shotgun Barrel - Black Shadow DR Winchester Repeating Arms 611261240: SXP 12 Gauge 3.5 in Field Shotgun Barrel Black Shadow DR 22 in