I love the smell of a new suppressor. The Yankee Hill R9 is a fully welded Stainless Steel suppressor with a crazy cheap price for what it is. For one it is made to suppress full auto 9mm sub guns, that being said it can use a bunch of mounting adapters. The can be used on a 308, 350 legend, 6.5 Grendel, 556 and 300blk to name a few.