Yankee Hill Machine Co Resonator R2 Suppressor 30 Caliber Rifle Suppressor 16oz 7.825 Long 1.562 Diameter Black Finish Includes Muzzle Brake (YHM-4302-MB-24A) 5/8x24 YHM-2130-MB-24This is an FFL item & requires shipment to an FFL. After order is placed, have your FFL email us a copy of their FFL referencing your order number.YHM's new.30 caliber sound suppressor the Resonator(R) was created to provide the shooting enthusiast a quiet lightweight and cost effective suppressor. Capable of being used on multiple calibers and host weapons the Resonator(R) can be used on rifle calibers ranging from.17 HMR through 300 RUM making it a great choice for all shooters. Like the Turbo(R) the Resonator(R) uses a tubeless design which consists of heat treated 17-4 stainless steel and a heat treated 718 Inconel blast baffle which allows the suppressor to be full auto rated and designed for rigorous use. Includes YHM-4302 Q.D. Mount of your choice.