ALL NFA RULES APPLY. The Revo 9 can also be configured into a short (K) configuration by removing the stainless black oxide external booster housing extension and collapsing the booster housing or 3 lug assembly into the silencer tube. This configuration is best used wet. By adding 5cc's of rem oil, wire pulling gel, or some other ablative medium sound suppression can be dampened extremely well in the short configuration.The Revo 9 is shipped in it's full size configuration with an included CAM-LOK Universal Piston. CAM-LOK Barrel Adapters (sold separately) are offered in many different thread pitches. Additionally our integral 3 lug 9mm QD assembly can be interfaced if desired to run on 9mm MP5's, AR carbines, or any 9mm wearing a standard 3 lug coupler.The Return to Zero baffles key together so that every time you disassemble the silencer and put it back together you can achieve the same baffle orientation so that your point of impact shift will remain the same negating the need to re-zero your carbine or pistol after servicing. (applicable to full size configuration)Additionally the MOD 3 can be fitted with the Taper Mount Minimalist Blast Shield for use with Taper Mount Muzzle devices. Mod 3 REV 9 Serial starts at REV9-0885INCLUDES:CAM-LOK UNIVERSAL PISTONGriffin Revolution WrenchFront Cap take down tool ** New Revolution Tool is only included with the 3rd Generation (MOD3) of Revolution Silencers.CLICK HERE FOR MANUAL Diameter: 1.375" Overall Length: 7.6" Weight: 11.2 ounces 9.7oz (short) Materials: 17-4PH Stainless Steel and 7075 T6 Aluminum Attachment: booster piston, Griffin 3 Lug assembly, direct thread mounts DB Attenuation: REV 9 SPL: 127db (Full Length) 124db (Short) Finish: Mil-Spec Type III Hardcoat Anodizing, Black Oxide, H900 heat treat Full Auto Rated: Yes 17-4PH H900 heat treated baffles Return to Zero baffle Tech Configurable size Piston, 3 lug mount interfaces, direct thread interfaces Griffin Armorers Wrench Included Fully shielded silencer tube for ease of cleaning Silencer pouch Included CAM-LOK piston Included Lifetime Warranty