Avengers 40mm Airsoft Gas Grenade Shell (Model: 55rd Multi-Purpose / Red Matte / Single Shell) scope mount Uses two (2) CR123a Lithium

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

15mm Overall Height: 22mm Hub Outer Diameter (to fit into Gear Box): 11mm  Hub Outer Diameter (to fit into Outer Barrel): 12mm Hub Inner Diameter (to fit Nozzle): max 8mm Material: Aluminum 6061

for adjusting how high or low the AR Chest Rig sits on the chest

NcSTAR ECO 4X34 Scope w/Green Laser & NAV LED (Black)

Avengers 40mm Airsoft Gas Grenade Shell (Model: 55rd Multi-Purpose / Red Matte / Single Shell) scope mount Uses two (2) CR123a LithiumFeatures Precision CNC machined aluminum construction Weather resistant anodized finish High quality silicone o rings for improved air seal and reliability Large caliber type shell designed to launch . 68cal paintballs or left empty to fire foam rockets balls (can also be loose filled with 6mm BB's using rubber cap wad) Easy to reset Manufacturer: Avengers Specifications: Gas: Green Gas CO2 Capacity: . 68cal Paintball or approx. 55rd 6mm BB