Resistance silencers are best suited for users that desire a premium fixed length pistol suppressor with best in class materials quality performance strength and mounting options. This line of fixed-length silencers offer the best possible quality at the best possible price. - Resistance silencers are user serviceable ensuring long high performance service life. The front caps can be interchanged on the Resistance 9 & 45 models for the smaller .22 caliber or 9mm front caps. 17-4 stainless steel heat treated patent pending ECO-FLOW baffles with anti-rotation features ensure maximum strength and sound performance as well as reduced gas blow back on semi-auto or full-auto firearms vs traditional designs. Included take down tools allow for an easy and satisfying end user maintenance experience. - 17-4PH H900 heat treated ECO-FLOW baffles - 7075 T6 Hardcoat Type 3 anodized Aluminum tube - 17-4PH Nitrided booster housing - 17-7 spring - 7075 T6 Hardcoat Type 3 anodized Aluminum piston retainer - 7075 T6 Hardcoat Type 3 anodized Aluminum front cap - What's in the box? - Silencer tube body - ECO-FLOW baffle assembly - 9mm front cap - Boost assembly (retainer spring o-ring & housing) CAM-LOK Piston not included - Multi-Function wrench - Front Cap tool - Branded Griffin pouch - Manual