I was answering the question from jnc24. I guess I should have quoted him but I thought it was pretty obvious I was answering his question. I would not "upgrade" because I don't want to carry around Glocks thicker and heavier G21 and G30.(if had no other choice but that size it would 10mm not .45) Not to mention the .45acp has negligible at the very best performance vs the other common service calibers. Its not like I don't have or could not get preban mags anyway. Plus I already own the other guns. I don't know of any aftermarket limiters for Glock mags. Some guys have made their own to be legal for hunting purposes however. If another AWB happens it depends how it is written as said before. The anti dbags are going to have an impossible time trying confiscate mags so you would probably end up with grandfathering.