9mm AR what are the cons

[mmcbeat]

I have my eye on a Colt 6450. Anyone own one? How reliable are they?

 

[Shoot Summ]

They are both fun, my suggestion is to register an SBR lower, and get a 9mm and .223 upper that you can swap out.

Here is the 9mm upper installed:
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Here is the .223:
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[RustyZX9]

I see several folks are saying they are not 100% reliable, but do you know why? Another member on here has a 9mm AR with a RDIAS in it and he brought it out to the range on veterans day and it ran 100%. We shot a LOT of ammo thru it and it was almost all on full-auto including at least 1 Beta dump. I would say that they can be reliable if his is an example, but I do not know what issues others are having.

The only time that mine chooses not to cooperate is when I'm on the clock! lol... I can stand around punching holes in paper all day long without a hickup, but as soon as that timer goes off things are not as easy. I think that just the way of things I guess. I have seen and fired the exact same setup as mine on full auto several times with no issues as well.

Since we're sharing pics...