The GEMTECH Lunar-45 is the culmination of decades of silencer innovation. We have created the lightest and quietest modular 45 caliber suppressor available that is able to be completely taken apart and cleaned. The Lunar-45 is crafted from military grade aluminum and titanium for the utmost in durability and strength. GEMTECH offers a variety of mounting options for the Lunar-45 allowing it to be used on a variety of platforms and calibers. The Innovation Accuracy and Quality is what makes GEMTECH The Professional's Choice for DecadesModular .45 caliber silencer. Intended use: 45ACP. Also compatible with 9mm 40S&W (dry only) 10mm (dry only) and Subsonic 300BLK.Specifications: Caliber: 45ACP Sound Tested: 129dB LONG HKA(R) Mark 23 | 137dB SHORT HK USPA(R) 45Ct | 129dB LONG/136dB SHORT Dan WessonA(R) 1911 45ACP | 128 dB LONG/132dB SHORT GlockA(R) 19 Gen 4 Diameter: 1.375" Overall Length: 8.5" long 6.9" short Weight: 12.3 oz. long 10.9 oz. short Mount Type: Shipped with a .578-28 Piston Tube Material: Aluminum Full Auto Rated: Yes Tube Finish: Type III Hardcoat Anodized