Ref your last post. YES, testing is good. You know what is more prone to happen that way. NO, testing out those rifles will NOT determine How much better the KAC is. Yes it would be a waste of time and money (ammo and to and from the range). IF you are set on a KAC, WHY would you want to possibly diminish what you can get out of the guns you have. The second one down in the first series of pictures looks like my Colt.

P.S. I REALLY like that shorty, but bet it is a Bit#* er ah loud. How long is the barrel btw?