Might want to just get a new handgaurd.Yeah, IR laser and offset vampire light which fits on 5 slots on a different rifle.
Have ran a midwest handguard on MP5 with NGAL for a while. Has held zero for the better part of 6 months. It has a tension screw to take out any play if I recall correctly, very solid.most of the options out there don't look too sturdy and I've got questions whether they would hold zero. I figure a reasonably small weld on the cocking tube would be certain and may cost less than $300 for the Spuhr handguard.