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one for 1/8" hose insertion and one for QD connection like other HPA airsoft regulators
that gives the most reduction in FPS output
Within normal 1-1
Introducing the Gen 4 HPA CRBN Uppers - a new level of durability
It includes a manometer on the side to help show your current output pressure
4UAD Magnus Pro VFC/GHK GBBR Hopup Chamber with TDC mws one for 1/8" hose insertionFantastic 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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