thinking about a project. what barrel lengths are available for ar's? has any one had success with a shorter then 14"? meaning any major problems? heard the only reason the c8 or m4 had a 14" barrel was so a bayonet could be used. i have no c8 experience since at the time of my service only armoured were issued it and obviously no m4's were around. the old vietnam era commando's seem to work well. i'm thinking a barrell between a commando and a c8 maybe 10", 11", 12" ish. is that possible? also any idea were to get the old c7 upper? fixed carrying handle casing deflector flip battle sight. dpms has them but it is over $100 (us export). well thanks in advance.


















































