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The hopup wheel height indexed was completely re-engineered
pull and it's secured
On one side
An additional O-ring around the shaft prevents the pin from coming loose due to vibration
with no tools required (though a little pin or stick does make it easier to reach)
4UAD Magnus Pro VFC/GHK GBBR Hopup Chamber with TDC nub The hopup wheel height indexedFantastic craftsmanship and cool looking design. This new hop up chamber from 4UAD in Taiwan is a great upgrade for your VFC or GHK M4 GBBR. The anodized gold colors are visible when retracting the bolt, making sure to turn heads on the field, as well as hit heads with it's price TDC hop up adjustment system. The Top dead center TDC adjustment system guarantees that the hopup nub is always centered during adjustment, increasing consistency across
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