Tight tolerances - UTG Pro Super Slim Picatinny RMR Low Profile Mount

For the price this mount is good. My only issue was how thigh the tolerances were on the 1913 pic rail section. I was using it to top mount a RMR style red dot to a Burris AR-P.E.P.R Rifle Scope Mount and the couldn't get the teeth of the pic rail to slide into one another. A little love from a gunsmith rubber mallet finally got the two pieces to seat. After that mounting the dot and torquing every thing down was a breeze. The RMR style dot mounted solid and so far no shift in zero.