High durability rubber material

Thread: 14mm Counterclockwise w/ 11mm adapter

Switchless Power On: Shake and Wake

Inner Barrel Length: 510mm

Bungee system allows for some movement of the slung rifle

Elite Force Magazine Rebuild Kit for UMP Airsoft Pistols (Model: 2262046) mag High durability rubber materialBen Franklin forgot about leaky gas airsoft magazines when he said "nothing can be said to be certain, except death and taxes." Leaky gas airsoft magazines are a sure thing. At some point, it will happen, even if you own our exhilarating HK UMP GBB submachine gun. What happens when the inevitable occurs is entirely up to you. You can either toss that salvageable magazine in the trash (don't you dare!) or go pick up one of our HK UMP GBB Mag Rebuild