GEMTECH ABYSS(TM) 5.56 GEMTECH is SILENCE THRU SCIENCE. ABTSS(TM) 5.56. Featuring five of GEMTECH's latest patent-pending technologies, the ABYSS 5.56 is destined to refine the hard-use suppressor category. Its proprietary design reduces muzzle flash and decibels while also reducing gas blowback for improved user comfort and host reliability. GEMTECH ABYSS(TM) 5.56 Durable - Constructed of 17-4PH Stainless Steel, and 6AL4V Titanium. Abyss has much greater wall thickness than many competitors, but at a similar or lesser system weight. Full Auto Rated, Short Barrel Rated Versatile - Optimized for 5.56NATO, but also rated for 5.7x28, 6MM ARC, and more Mfg: Gemtech