The Spectre 9 is the next evolution in SilencerCo s collection of titanium suppressors. It s completely constructed from titanium and designed for pistol and subgun platforms. The Spectre 9 is extremely lightweight due to its construction and compact for minimal impact. It s a great option for personal protection, low-visibility applications, or days at the range. The Spectre 9 is compatible with 9MM and 300 BLK. It is full-auto rated for both subsonic and supersonic 9MM. It is full-auto rated for subsonic 300BLK and semi-auto rated for supersonic 300 BLK. It s compatible with the SilencerCo Alpha accessories and mounting systems and ships with a tool and the Spectre Piston Housing Assembly. Product Specifications Caliber Compatibility: .9MM & 300 BLK Subsonic Accessories: Alpha, Pistons, 3-Lug Weight: 3.9 oz Length: 4.76 Diameter: 1.37 Materials: Ti Grade 5 & Ti Grade 9 Muzzle Average: 9MM: 132.7 dB, 300 BLK Subsonic: 133.3 dB