don't put a reg on a mag at all its redundant get a good daul regulated nitro tank Like a nitro duck with adjustable output or angel air then get a barrel with an effective length of no more than 8 in. and one wich cuts off acceleration fast like a two piece then check bore paint match this is the best you will do another reg will only slow down recharge rate and during high rates of fire probly hurt more than help consistancy
Z-griped, warped, retromag with super bolt, and warpleft polished body, freak kit and flatline 3k