Ok so I left my Preban Natl Match HBar with my Dad back home and instead of shipping it out to MD I am thinking about buying a new colt in a carbine set up. Looking at a bare bones weapon (well I will add a houge grip, but thats it) as its a carbine. I looked up the colts that comes as carbines and I can't see any difference in them other than weight and that 6920 and 6520 have LE only markings on them. The ability to detach the carry handle isn't a big deal to me either. Are there differences that I don't have the experience to notice? Namely concerned with weight, but if the heavier barrel is considerably more accurate then I am ok with the pound and a half difference. Thanks.