Pro-Arms CNC Aluminum Threaded Barrel for SIG Sauer ProForce P320 M18 MHS Airsoft GBB Pistols

"Fits in the slide perfect just like the factory barrel. Used this on the VFC (Sig Proforce) P320 X Carry with no issues. Though there is a little bit of space between the inner barrel and this barrel when installed so I would recommend wrapping a thin layer of tape around the end of your inner barrel before sliding it in to prevent loss of accuracy.