Sig Sauer P320 Compact Barrel Black Nitride

A: Just read through a whole thread dedicated to this question on the Sig forums. And there are many who believe it'll work, but none of them have ever tried it. Those that have tried throwing a 9mm barrel in say it does not work. https://www.sigtalk.com/threads/p320-40-slide-vs-9mm-slide.277257/ That is not a conversion kit you linked to and is just a 9mm barrel. Id look for a conversion kit.

A: Your best bet is to contact Sig customer service. CALL 603-610-3000 or go HERE ( https://www.sigsauer.com/customer-support#:~:text=CUSTOMER%20SERVICE%20REPRESENTATIVE,-Please%20be%20advised&text=If%20you%20have%20questions%20regarding,for%20answers%20to%20common%20questions. ) I hope this helps!

A: James, no Sir it will not. Only the Sig .40S&W to .357Sig or vice versa will work. You would need a complete 9mm Slide/Barrel/Magazine Sir.

A: No, you need the 9mm slide for the 320. The 9 barrel won't completely fit tightly in the 40 slide. 40-9 conversion barrels for Glocks and other gun are milled to specifically fit the 40 slide.