Anyone with a .40S&W AR upper?

[G27]

Just curious if anyone around here has (or has experience with) an AR upper chambered in .40S&W. I'm spec'ing out another AR and thinking of picking up one of these (or building one) as I have tons of .40S&W and like the round.

Thoughts?

Bueller? Bueller?

TIA...

[hipower]

I've heard of them, but never seen or had hands on one. But I'd say it would be an interesting weapon. In fact, just the other day my brother-in-law and I were talking and he mentioned the possibility of doing one in 45acp. That would get my attention...quickly.

[G27]

Yah, not looking like there's a ton of experience with them around here. Looks like I might just need to be the lab rat!

[dlm37015]

i have a 10 mm got it from olympic arms they also make 40 s&w uppers mags are not that great .i made an upper in 7.62 x 25 its great look at making one ammo is cheap and it shoots great can even load it subsonic and cycle the action