Like the Maxim model 1910 silencer, the Advanced Armament Illusion 9 features an offset, non-centralized bullet path. Unlike the Maxims of old, the advanced design of the Illusion 9 incorporates a highly evolved, patent pending A.S.A.P. (Assured Semi Automatic Performance) system that ensures reliable operation on a broad spectrum of self-loading host pistols. This model is designed to be used with 9mm Luger ammunition and utilizes a 1/2x28 TPI threading. It features an all-black finish. This product does not include a piston and must be purchased separately. *Sound reduction ratings are approximate based on measurements by the manufacturer and may vary depending on firearm setup and environmental factors.*