GEMTECH's new GM-45 suppressor utilizes our patented G-Core technology. The G-Core design is exceptionally user friendly and allows the user to clean the entire unit. The GM-45 is shipped with the standard .578-28 piston with other several options available - Wet Sound Reduction: 32-35 dB - Sound Reduction: 21-23 dB - Caliber Rating: 45ACP 9mm 10mm (dry only) 40S&W (dry only) - Full Auto Rated - Length: 6.2 (without mount) - Diameter: 1.375 - Weight: 5.5 oz. (without mount) - Material: 7075 Aluminum - Tube Finish: Matte Black Cerakote with Reduced Visual-IR Signature - Core Finish: Matte Black Anodize