SPECIFICATIONS MATERIAL: ALUMINUM COLOR: FLAT DARK EARTH (ANODIZED) LENGTH: 149 mm / 5.86 IN. DIAMETER: 38 mm / 1.49 IN. THREADING: 14 mm CCW (COUNTER CLOCK-WISE) BATTERY: 4 x AAA (NOT INCLUDED FUNCTION ON/OFF FUNCTION TO CONSERVE BATTERY POWER INTERNAL FLASH ILLUMINATES GLOW-IN-DARK BBs AS THEY EXIT BARREL EXTENSION