Designed as a severe duty use submachine gun suppressor, the Trident9 is just as at home on a handgun. The Trident9 is sold as a 9mm suppressor module that can use 4 different mounting systems. The Trident9 can be ordered with a choice of either a 3-lug coupler, SWR LCD (Nielsen Device), s/s thread mount, or an UZI barrel nut mount ...Or all 4. The Trident9 feature include a non-wearing stainless steel mounting ring, & s/s first baffle/expansion chamber.