GasGuzzler. No dumb questions, but those you don't ask. As I understand it, you are correct. Sadly, I only have picatinny.
I believe Mlock and keymod both rely on an inserted bolt and/or other "male" fixture into the rail.
These rail covers fit around the outside of the pictainny rail and slide down. So, if you had a picatinny rail added to a keymod, or picatinny on top of the keymod, then they would work.
If you're ever near Aledo, you're more than welcome to swing by and try them out.
Edited by Darren M (11/20/17 06:56 AM)
There comes a time when honest debate, serious diplomatic efforts, and logical arguments have been exhausted and only men and women willing to take up arms against evil will suffice to save the freedom of a nation or continent.