TPRCSN Barrel, 3.1, 9MM, Spectrum (Rainbow PVD), Fits Sig P365 TP-P365B-XS True Precision barrels is a series of match grade drop in barrels which are designed to provide more reliable feeding of hollow points and defensive ammunition. This barrel features an improved and widened feed ramp over an OEM barrels. Additionally the barrel is made from 416 Stainless Billet with an 11 degree target crown and is made right here in the USA.