I've been shooting the VERSA-11 upper for the last year + as a VERY grateful beta tester.
I initially thought the glock magwell was silly but it is really just fantastic and I LOVE the ergonomics of this upper.
The mag release button is perfectly positioned and the magwell hits that sweet spot making reloads easy and empty mags drop free beautifully. As far as shooting, this upper just shoots flat and has the perfect (for me) ROF. My weenie finger can pull singles easily. I remember Vegas SMG talking up the first Max-31 and being surprised at how flat that upper shot when I transitioned to that upper. The VERSA-11 is a similar game changer, in my opinion.
The VERSA-11 is lighter, points really nicely, is equisitly ergonomic, and performs WAY better than my shooting skillz do it justice!
Two thumbs way up Lage MFG have hit it out of the park.
Oh yeah, I forgot to mention all them mag choices are just icing on the cake!