Easy to install drop-in design fits the P365 (3.1"), P365 SAS, and P365X (will not fit the XL 3.7"); Advanced proprietary broach cut design specifically engineered for increased accuracy potential; Broach cut 6 groove rifling allows for all ammo types to be used safely, including cast lead; 100% Designed and manufactured in the USA with USA sourced certified 416R stainless steel; 9mm 1/10RH twist rifling; Special deep style target crown for non-threaded versions or 1/2x28 threads with included thread protector on threaded versions; Threaded versions include Viton high heat integral O-ring lock thread protector; SAAMI spec chamber; Barrel length from chamber to muzzle: 3.62"; Barrel weight (without thread protector): 2.3oz