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Discussion Starter · #1 ·
i have a fully upgrades TM VSR, when my hop up if 100% off it shoots a consistent 545 FPS (.20) when i dial my hop up 1/2 way i loose 45 FPS.

i do understand that when you turn your hop up dial more of the rubber contacts the bb for more backspin but is loosing 45 FPS normal?

with the mod i did to the stock hop up arm the adjustment bar has to be turned on 3 clicks from the off position to just slightly overhop a .40bb.

ideas?
 

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Are you using he stock hop up unit? If so I would recommend shimming your hop up and doing the TDC mod. Also an aftermarket bucking would also help with consistency.
 
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