The Beretta PMXs is a semi-auto version of the PMX subgun offered internationally to military and police forces. A polymer design, it operates via direct blow-back and features ambidextrous controlled and a threaded barrel.
They’ve even done up a version in a Tigerstripe pattern to match the limited edition A300 Ultimate Patrol Shotgun.
It’s worth noting this was developed by B&T as the P26 and the design was sold to Beretta later on, hope they keep tri-lug barrels and thread those instead of offering just a threaded barrel. I always wanted to an SD version though of this!