Can I install M-LOK accessory rails to something else?

We like how you're thinking. Sure thing! If you have a reasonably flat section available, chances are you can make it.

You'll need two 7 x 12 mm rectangular holes for the recoil mitigation lugs and M-LOK T-nuts, or just one if you make it 7 x 32 mm. The material thickness must be at least 2 mm for the nuts to grab before bottoming out.

The center-spacing of the two holes is 20 mm.

If these measurements boggle your mind, it might be easier to just buy a metric caliper instead of converting these. For example, 7 mm is more than 1/4" but less than 9/32". It's a headache.

This should help you get started. If you're confused, choose something else to do while you drink beer. These aren't jobs for amateurs.