Posted: May 2nd 2010, 03:53 PM
Personally I don't think there would be any difference aside from weight. My Spike's 22LR conversion works flawlessly in all of my ARs, including my Bushy.
However, if you want a dedicated 22 and don't have any plans for a .223 then you'll save a butt load of cash just buying a 22. I have also have a Colt M4 22LR imported by Umarex. They are priced right and their 22 mags cost as must as anyone else's.
Check this out: