Rugged's Obsidian45 Suppressor features a non-slotted piston which creates a full circumference gas seal. Its ADAPT modular technology allows the Obsidian45 to have two configurations, so that you can have a shorter and lighter suppressor within seconds. The suppressor is constructed of 17-4 stainless steel with two indexing tabs for proper alignment. Brand Rugged Suppressors Category Suppressors Model Obsidian45 Caliber 45 ACP Color Black Cerakote OAL 6.70" Material Polymer NRR 129.30 dB Diameter 1.37" Thread Pattern .578"x28 Weight 10.70 oz