Launcher, 37mm, Single Action, Striker Fired, Side Loader Made in the USA! Caliber: 37/38mm (1.5”) Rimmed Ammunition. Will accept any length shell (depending upon loading) Barrel Length: 6” (22.9cm). Fully enclosed rim. Transverse pin lockup Dimensions: Length 9.75in (24cm) Height 4.5in (11cm) Weight 2lb 3oz Safety: Ambidextrous Trigger Block Stock: None. Fixes to Picatinny Rail with included 4” Clamp. Can be converted to stand-alone configuration with optional stock adapter Materials: 6061-T6 Aluminum. 4140 Steel. All materials sourced from the USA