Read the reviews. i wish i had. - TRYBE Defense Sig Sauer P320 Compact Match Grade Non-Threaded Pistol Barrel

Much like other 1 and 2-star reviews, this will echo. The spec and tolerance of the Trybe Defense barrel for the Sig P320 are not even close. One can see it with the naked eye. The slide will close if you can get the take-down pin rotated closed but once closed good luck racking the slide fully open again. I partially blame this on the manufacturer and partly on the distributor who has to know about this and selling them anyway. No wonder they are 55% off. I will be returning or at least trying to. If I can't, this might be my last purchase at Optics Plant.