||This is a great, low cost DMR front end. Threads are all good, parts all there, fits a 509mm perfectly. Some dings where the black had been chipped off, but nothing bad.
Only gripe is with the state in which the unit came. The whole front end came in a clear, hard plastic bag entirely assembled and torqued increadibly tight.
The gas block must first be removed by punching out three pins, then pulling one out (straight from the bottom) which came out with some dificulty and grunting with a pair of pliers.
The locking ring must them be removed (clockwise when looking down the barrel) which, for me, required a pair of groove joint pliers and a towel to prevent marring the finish.
There are also no barrel spacers included, so some extrapolation might be required if the RIS won't tighten down top-up. Also the fake gas tube might need to be shortened.
Hope this helps any potential buyers. Don't let it discourage you from buying it, the look and feel of this kit is totally worth it!
Tough to install
Rating: [4 of 5 Stars!]