How does a fixed pressure tank work with a mag?

[JEDI]

I want to get a cheaper tank than my flatline for a back up. I was thinking of a simple screw in pure energy, or other cheap screw in tank. Doesn't a mag need that adjustable input pressure that the flatline provides. And please don't say, "Well, just get the adjustable bla bla tank, it's only $300." I said cheaper...

[phish]

adjustableness is not needed because mags have a reg in them, i suppose you could get an adjustable if you wanted to tune your the rt-ness of your trigger

[FrAuStY]

Just as fish said... the adjustable reg on the tank is good for rt's or angels etc..ones that can shoot efficiently on less than 600 psi. I've used a steel pmi pure energy tank on mine before I got my flatline and it worked fine. :)

[krafty]

My almost 7-year-old Minimag (with original valve) has been functioning perfectly for the past year with a Crossfire 68ci Stubby @ 850psi output.

[JEDI]

Well, I have an RT pro, so it will work, but I cant tune the reactiveness with a fixed output? So it would be ok for a back up tank?

[krafty]

You should be OK. You won't be able to adjust the reactiveness, though. What pressure output? (My tank at 850 made the trigger of a ReTro Valve very reactive, but not over the top).

[MikeCouves]

Well you can use a preset on a regular mag, because as saud above, the A.I.R. (Advanced Internal Regulator) regulates the pressure down to like 400 anyway.

On RT's you don need an adjustable, but with a preset you will not be able to adjust the pressure/reactiveness.

[xmetal2001]

The only point of an adj. on a mag would be to adjust reactiveness on an RT, Retro, RT Pro, or emag.