I got my 10mm Mech Tech CCU last week. It seems to be a very sound unit. I took it to the range and it shot great. took about 4 shots to dial in the eotech. It took my 180gr golden saber out of 5.2 barrel from 1250fps to 1420fps out of the 16.25fps. It is a blast to shoot. it even feed my my converted Asian Military 45acp mags with no problems. Now the only problem it the amount of ammo it goes threw.