No gunsmith needed advertisement isn't a true statement and gold pvd coating is terrible!!! - Rival Arms SIG Sauer P320 Carry Barrel

This barrel doesn't have the provision for the Loaded Chamber Indicator (LCI). If you want to use this P320 Rival Arms barrel and your slide has the LCI like the Sig M17 and M18, and you want to retain it or required to retain it, you'll need to pay a gunsmith $50-$75 to machine a slot in the barrel hood to accommodate the LCI. This wasn't mentioned anywhere, so FYI.
Also, the TiN "Gold PVD" coating wasn't coated or lightly coated, so there are black spots and slight dull corners. For the asking price, you would think you'd get better quality barrel.