Gemtech designed the Abyss 5.56 as a hard use suppressor that can withstand torturous firing patterns, extended use and just about anything you can throw at it. It is made from a combination of 17-4PH Stainless Steel and 6AL4V Titanium, making it stronger and lighter at the same time. The baffle design gives the Abyss lower back pressure, making shooting it more comfortable than many other cans. This is especially important for full-auto use. It is rated for 5.56, .223, 6mm ARC, and 5.7x28, and is full-auto rated. All silencers require the purchase of a $200 Federal Tax Stamp. Gemtech Abyss Suppressor 5.56 DT 1/2X28 Black