trying to upgrade a friend's mini-mag...its basicaly stock with a new barrel / drop / X-chamber
what i'm thinking about doing:
-remove xpansion chamber---replace with gas through / foregrip
-remove old drop forward (he wants to get an on/off) replace with Taso
-add 14" - 16" barrel...probably CP or something similar
-add level 10 valve / bolt kit
-add double trigger frame
any suggestions on parts / brands / alternative stuff?