Just a thought for you… it would be like Centurion Arms, KAC URX 3, or MI rails covers on your Troy VTAC Rail though.
Any rail covers with holes in them already and slightly rounded should work. More will probably be available for M-LOK and Magpul will probably out with some soon.
Say like the MI (like most) rail covers that use button head cap screws to screw into the rail. Use the rail covers, get longer button head cap screws
and “Width Bridge Spot Weld Nuts” to attach from the back. I think the nuts would be thin enough to fit through the spaces in the VTAC rail, with blue Loctite,
turn the nut and tighten. They should be just long enough to have the nut on the back, fit through the space and to turn before tightening.
The supplied screws might be long enough, but I doubt it. The cap screw would not self-center and you would have to ensure it is centered as you tighten the screws
for them to be centered. With the screw tight, would slightly bent the nut and the plastic should have enough to keep it from moving off center.
You could probably find a small spacer, of some sort, to fit around the set screw and the space in the rail, if needed. If you started with the bottom covers first,
you could get a small screw driver in the spaces above to keep the nut right as you tighten. If you put a handstop rail (of some kind) on a bottom rail, I would try
and find a spacer to keep it from possibly moving.
It would be just like how the Magpul MOE rail sections attach to the MOE hand guards, except your putting them through a VTAC rail instead.
They use the same type of nut with their rail sections. The nuts can be painted to keep for rusting, as I think they are steel, or possible get some like Magpul’s.
I think this would work and would not add anymore weight or bulk than adding them onto a KeyMod or M-LOK rail.
Cost is no more than the rail covers and some longer button head cap screws and some ‘width bridge spot weld nuts’.
Kind of a long explanation. Hope this makes sense. Just my two cents.
Good Luck.
me