Nine Ball Hi-Capa 5.1 Gold Match Inner 6.03mm Barrel Pistons and Piston Heads Uses two (2) CR123a Lithium

Uses two (2) CR123a Lithium Type Battery (batteries included)

Shoulder Straps also include Elastic Band sections to expand and contract with your body movement

If you're not sure

The resulting EPF-S is not only stylish but also extremely comfortable to use

Shoots 340-350 fps w

Nine Ball Hi-Capa 5.1 Gold Match Inner 6.03mm Barrel Pistons and Piston Heads Uses two (2) CR123a LithiumNine Ball Hi Capa 5. 1 Gold Match Inner Barrel. Works only with Gold Match Hi Capa pistols (will not work with other Hi Capas other than the Gold Match). 6. 03mm inner barrel diameter. A great upgrade barrel for your Marui Hi Capa Gold Match. 112. 5mm long. Made in Japan