Retro Valve

[Echo]

im getting a tko automag and i saw a site that said i should spend 300 dollars on a retro valve. i dont think i ever would do that.. but what exactly is the retro valve?

[Halliday]

ReTro valve: faster recharging, no shootdown (losing power), and a quicker trigger.

Just get the Mag first and use it for a while.