.12 y the hate

Hey im gettin a g3 with 3 mags and i want to filll one mag with .12s and use it as a suport weopon wat do u think by the way do .12s harm ur gun or barrell cuz i heard they mess up yer barrel

Take a look at this thread, it'll answer your question:

http://www.airsoftallies.com/ask-a-pro-f24/can-a-bb-affect-the-barrel-t4686.htm

Bottom line, don't use them if you care about your gun.
They scratch the barrel, will tear at your hopup, and be terribly inaccurate.

Tell you what, shoot a mag of .2's then shoot a mag of .12's. If you still want to use .12's after that even for a support gun well that's just crazy if you ask me.

yeah just go with .2's you will still have some acuaccy and you gun will last longer.

also please don't say you are going to use it to spray and pray.

I might actually use .25g BBs for accuracy and .2 for speed. But bear in mind, if you switch weights during a game, you'll need to readjust your hopup, which can be a pain on the G3.