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Gas Blow back Cycling is ultra smooth
Compatibility: For WE M4
Balanced armature winding with strong neodymium magnets
Improve air flow and featured adjustable FPS
PDI W-hold Hopup Bucking GBB/VSR-10 (50° / 70°) color-tan Gas Blow back Cycling isPDI rubbers have two ribs for improved air seal. The design has two nubs with a channel in between, which helps center the BB in the barrel for more consistent hop application. This hop up will work in most Tokyo Marui gas blowback guns. Fits MP7, Detonics, Sig P226, G series, 1911, HiCapa (including xtreme), MEU, FN57, G18c, Warrior series, PX4, and more! Will not fit in the Desert Eagle. Will work in KJW clones. From PDI: PDI W Hold Hop Up Chamber