Fits 1" feed tubes. Not for standard paintball guns.The BDF (Ball Deflecting Hopper) low profile was specially designed for the MKX8™ marker. Tests show, while holding the MKX8™ still when shooting, a reliable 23 shot average before misfire. Further tests show, while moving with the MKX8™ on the field, you should experience little or no misfire. The special improved feeding design makes a big difference. Holds 180 rounds. Clamp neck uses 5/32 hex wrench. Built using near indestructible plastic. Semi-transparent lid. Fits 1" feed tubes.