Type: CO2 BB Machine gun. Manufacturer: UmarexUSA. Model: EBOS. (Electronic Burst Of Steel) Materials: Plastic (polymer) and some metal construction. Weight: 2.95 pounds. Barrel: 9.75 inches, metal non-rifled. Propulsion: CO2 x 1 (88 gram). Action: Semi/Full auto 1-4-8 shot burst, electronic trigger motor driven. Ammunition Type: 4.5mm BB's Ammunition Capacity: 360-400round hopper with 24 shot internal spring fed magazine. FPS: 540 (single shot). The Umarex EBOS is a really - really fun BB gun! That should almost be enough right there to buy it on the spot as it's not all that expensive all thing considered! The EBOS has a lot going for it, nice high up to 540 fps velocities, very good accuracy for a BB shooter even in full auto mode, a high capacity CO2 and BB feeding system, versatile shooting selection (1-4-8 shot burst) and (300-400-500 rounds per minute), the ability to add accessories top and bottom and a price tag that is very reasonable. Unfortunately this Umarex product is not that readily available here in Canada because the scary 540 FPS rating on the box, but for you non-Canadians, you're in luck so make sure to think about us Canucks when your spraying BB's with the Umarex EBOS. Read full article here: https://www.replicaairguns.com/2011/7/31/umarex-ebos-co2-bb-machine-gun-review.html Buy BB Guns in Canada: http://www.replicaairguns.ca/bb-rifles/ Buy BB Guns in the US: http://www.replicaairguns.us/bb-rifles/