I need blowback for realism I have ebb on my gsg522 and it actually adds some kick to it and I like the sound its my personal preferance I am looking for a full metal cqb m4 and the reason I am upgrading it is because who doesn't want the best gun they can possibly have I know some people will troll me for upgrading right away but once again my personal preferance, my money, my life I'm only asking for advice thanks
how about classic army? this a good shell to upgrade?
http://www.airsoftgi.com/mobile/prod...oducts_id=5851