It would have to be one helluva an improvement over FTU for me to even consider.
Mounted and attempted to zero a Vortex Spitfire 3x on my buds FTU.
The ONLY mag that worked decent was the factory supplied 5/30.
Tried my IWI 10rd pistol mags,no feed issues but super tight and got stuck in magwell.They drop free like a rock from my XCR.
PCV BW50 mags same....super tight but they are a wee bit sticky in XCR also.
C-Products BW50 were terrible,fit ok but lots of FTFs/stovepipes.
I hate the mag release.
I hate the safety even more.
Never did get it zeroed as I was too pissed off and ran out of daylight messing with mags and jams.
I will say at 25m it shot a sub 1" 5shot group,but the line of sight is a good 4-5" above bore which I didn't take into account when zeroing at 25 and at 100 it was of course wayyy high.