Just the other day, (and inspired by a post here on FCC), I went looking for a Glock chambered in .50 cal
Couldn't find one with a pistol brace, though.
Well, it looks to have a better grip angle than a glock, and the loss of “finger grooves” on the front strap is seen by many as an improvement.Edit: I don't think this is an improvement over a Glock.
I wouldn't want an optic on a carry weapon, the front sight looks easily damaged, where are the finger grooves, and that's the ugliest holster I have ever seen.
And... (guessing?) more expensive than a Glock -- although I have not priced lately as I have all the Glocks I will ever need (meaning, just one), and then some.