Quote Originally Posted by J View Post
What he is talking about is the design of the system in regards mostly to mags. There are two main types of 9mm AR, the one originally developed by oly, and one originally developed by Colt. Almost all 9mm ARs are one form or the other regardless of who now makes them. There are a couple that take glock mags, but are far less prevalent.

It looks like that double diamond is a colt based design.
Ah... I see. Sorry, I misunderstood the question. Also, I really know nothing about the 9mm platform so my ignorance on the subject probably contributed to my misunderstanding.

That's why I post stuff like this here. So I can better educate myself so that I can make informed decisions.

Double Diamond actually offers a lower like the picture I posted above but is made to take Glock 17 magazines. I might do a little research on that one.

Thanks.