Yes, its a 5.7. Six inch barrel with the six inch can makes it flush with the hand guard. The best part is it drops the brass straight down through the magwell. And you can use an old mag as a brass catcher. I belive a friend of mine has a sparrow that he uses on his. Works great. Sound like a 22lr rifle unsupressed. Recoil is like a 22lr.
The upper i got is awesome, i love it for the specific purpose it was built.
But it has some things that really suck at the same time. There is no using any sort of quick release on the optics as the rail was so out of spec, i had used a high dollar aimpoint mount, arms mount, anything that does not have a ton of adjustment wont tighten down solid. But it works great with the dd ones, which i was going to use anyways. And the way the mag sits there is no magnified optics, unless you have very very slow mag changes because its hard to remove with any sort of optics in the way of the mag. That being said, 5.7 is good out to like 150 yards, wasnt designed to really do farther so a good red dot is all you want anyways.
I also had a friend that bought this upper new that came with a bad extractor. Sent the bolt back to the company and they actually sent two new bolts and now it works great. Only out the return shipping.
Mag changes are alkward, and slowish. But you got 50 rounds to work with. And they cost 45$ for good ones.
If i didnt like the fact that the controls are basicly the same as an ar, i probaly would have just bought the p90.
Back to glock....
Theres a cut you do under the trigger guard that i did on my g40. You take literaly 1/100 of inch off and change the angle and its night and day better. Releaves presure on your middle finger. But i have fat fingers. Wouldnt hurt the strenghth of the frame. The barrel is the limiting factor. At least thats what the glock kaboom threads say.
I have one, but its the bigger brother g40
