Fits the Sig P320 Compact, X-Carry (minor fitting may be required on some X-Carry models), and M18 (will not fit the X-Compact). Easy to install drop-in design. Barrel length is 3.87" from breechface to muzzle. Retains Loaded Chamber Indicator cut for M18 to allow interchangeability among P320 variants. 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 11 degree competition style Mfg: True Precision