There are no proprietary muzzle devices, moving parts or frills on Radical Firearms RF 7.62. This is quite simply a silencer. Threaded in 5/8x24 to accommodate almost any .30 caliber barrel on the modern market. Based in Stafford, Texas, these guys and gals build firearms and firearm components for everyday shooters. The model is simple: build a quality product for a reasonable price. Silencers built for customers that will do the job but wont cost you an arm and a leg. This particular silencer is rated up to 300 Win Mag. Weighting in at 20.4 oz and 8" long, the RF 7.62 is a good silencer with a great price.