The True Precision P365XL Barrel delivers enhanced accuracy and performance for your Sig P365XL pistol with 9mm chambering 1/2x28 threading and durable Titanium Copper Nitride finish.True Precision P365XL Threaded Barrel - 9mm4.22" barrel length from chamber to muzzle1/2x28 threads with included thread protector and Viton O-ringTitanium Copper Nitride finish for corrosion resistance416R stainless steel construction6-groove broach cut rifling with 1/10 right hand twistDrop-in design for easy installation100% designed and manufactured in the USASAAMI spec chamber for reliable feedingPerfect for shooters seeking improved accuracy potential and suppressor compatibility this precision-engineered barrel fits P365XL (3.7") models only and supports all ammunition types including cast lead bullets.