Nine Ball Speed Mag Bumper For Marui Hi-Capa 5.1 (1pc) Major Color_Rose Gold and your magazine will look

and your magazine will look a lot more like the real gun magazines

the gas pressure required for the firing is stabilized (BB bullet is to spread to 2m square 20 ~ 30m strength practical distance

KM4 Series part 229

Resemble all the movable feature of a real M4A1

and QD sound suppressor

Nine Ball Speed Mag Bumper For Marui Hi-Capa 5.1 (1pc) Major Color_Rose Gold and your magazine will lookCustom parts for Hi Capa Speed Mag Bumper BK 1 piece Tokyo Marui Gas Blowback This is a magazine bumper with a side wing type asymmetric shape that makes it easy to change magazines or release them from the pouch quickly. This special shape makes it easy to insert and remove from the magazine pouch even when wearing thick combat grade gloves, making it a useful item for speed shooters. The material is an elastomer material that has strong impact