The True Precision TP-P365B-X is an exceptional drop-in ready barrel from True, crafted specifically for the 3.1\" Sig Sauer P365. It is compatible with the SAS, X, Spectre Comp, and Xmacro Comp version only 9mm models. True barrels provide unparalleled accuracy with their advanced cuts, chamfers, and uniquely designed feed ramp, designed to surpass OEM standards. It ensures reliable ammunition feeding of all design types.Reflecting True\'s dedication to quality and excellence, the barrel features a proprietary stainless steel broach cut rifling. This underscores True\'s commitment to those who settle for nothing but the best. The True barrel sets itself apart as the ultimate upgrade for the Sig P365.