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Old 06-30-2013, 06:22 PM   #2 (permalink)
MCB Member
Join Date: Apr 2006
Location: Saugus MA

It depends on the output pressure of the HPA tank. Some are "low pressure" with an output of @ 450 p.s.i. If it is "low pressure" output, you'll need to rework the springs and valve tube considerably.

If it is a "high output" regulator, @800 p.s.i you may just need to lighten the valve spring.

Stock Nellies were designed to operate on CO2, which is at 850 p.s.i at 70* F at sea level.
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