Sig Sauer 8900443 P320 Full 9mm 5.5" CIP 1/2x28" Barrel The Factory Replacement Barrel for the Sig Sauer P320 full size is a durable and reliable upgrade for your pistol. The barrel is heat-treated to enhance its ruggedness and ensure reliable performance, even in harsh conditions. The barrel also features 1/2x28 RD muzzle threads, which allow for easy attachment of a suppressor or other muzzle device. It is important to note that this replacement barrel is only compatible with the non-loaded chamber indicator slides and pistols. If your P320 has a loaded chamber indicator slide or pistol, this barrel will not be compatible. Replacing the barrel on your Sig Sauer P320 full size can be a great way to enhance its performance and accuracy. With its rugged construction and threaded muzzle, this replacement barrel is a high-quality option for those looking to upgrade their pistol. Sig Sauer P320 Full 9mm 5.5" CIP 1/2x28" Barrel 8900443