MANUFACTURER: Tapco FAMILY: Accessories MODEL: Conversion Barrel TYPE: Accessory-Barrels ITEM GROUP: Handgun Magazines FINISH: Black Nitride FINISH TYPE: Stainless Steel THREAD PATTERN: 1/2x28 SHIPPING WEIGHT: 0.35 lbs. ADDL INFO: Fits Glock 22 Gen 3 & 4 ADDL INFO: Includes Thread Protector MFG MODEL NO: TAP22018 UPC: 810122800163