UPDATE:
We had Kalashnicon 2020 this past weekend and I ran the Dtech VZ58 with the bonesteel srs handgaurd set. The handgaurd set performed very well. The gun was shoved through port holes and braced up against barriers, grounded, heavy round count stages, long distance out to 400 yds.
The highest round count stage we called 5 card stud. 5 boxes numbered 1-5, the RO (me) has 10 cards in my hand, Ace (1) and 2-5, with 2 of each. I call a number and shooter runs to box and puts 5 rounds on the applicable target set at 25yds, total of 50 rounds to shoot it clean. It is a very fast paced stage. I used 2 whole mags because I dump an extra shot to ensure I dont get penalty for not having enough rounds on target. It wasnt especially hot, maybe 75-80F but dumping 2 mags that fast heated the gun up quick, barrel was hot, gas block was hot, handgaurds were not and I shoot it thumb over bore and dont wear gloves shooting, I was impressed between the slate industries mlok panels and handgaurds to dissapate heat as well as they did.
Barrier wise the slate stop performed very well and the handgaurds did not deform from being forcefully shoved into barriers, hitting the ground hard, and generally being abused.
Long distance the handgaurds did not seem to affect accuracy any as I was able to hit 4 moa targets out to 400 yds, we have the opportunity to make it to 600 but I did not shoot good enough for that and I am blaming the vortex razor reflex for that.
The Vortex Razor...
It has been giving me problems for about 3 weeks now. Windage drift real hard, thought I had it fixed and zeroed but as the event progressed I found myself holding farther and farther right. It shot loose 3-4 weeks ago, de grease, loctite, and torque back down, now the set screw seems to not want to lock in windage and elevation adjustment very well. I can say that the railed upper was not the issue as it is still solid as a rock and has not been removed since installation.
Overall Id give the handgaurds a solid 5/5
Good heat dissipation, does not have a negligible effect on accuracy, upper holds zero, very light, very utilitarian.
Only down side is the lower would need to be removed for accessories that slide onto 1913 rails but that's a non issue for me.
Razor had a 4/5 when it worked because it has a beefy 3 moa dot, would prefer a little smaller.
Right now its a 2/5 because something with rhe razor name shouldn't have a drifting dot when the mount is tight
May consider a better folding stock and steel trigger next from obibonjovi once funds recover