Yes I do and I absolutely love those rails. I'm thinking about getting a real Troy rail for an AR build in the near future.
I almost did that, and then I discovered that they don't make a 12" rail for some reason. They make a 13", which covers half the gas block on a rifle-length gas system and doesn't allow you to use a gas block front sight, and an 11", which has a huge gap behind the gas block and doesn't allow a bipod to be mounted as far forward as I'd like. Ended up going with a Midwest Industries SS-12, which looks very similar.
Yea I would assume the rails looked similiar to the Madbull rails and were relatively the same size. I'm planning on building something similiar to the G&G m16 above.
Well, that assumes that the gas block on an airsoft gun has to go in any specific place. My two cents? If you're spending the money to free-float your barrel with something like a TRX rail, you want your front sight attached to the barrel, not the rail. The point of a free-floated rail is to remove the inherent flexing of the handguard from the equation when lining up your sights, but if you put the sight ON the rail, you've re-introduced it again and largely negated the benefit of a free-floated gun. So it's for this reason that I wonder why they made a rail that cannot be properly used on any length gas system with a front sight gas block, unless you're mounting a low-pro gas block on a rifle-length system, and a second front sight/gas block combo near the muzzle, like a dissipator upper. I've only seen that done once before, and it was on a riced-out match AR. Looked kinda ugly, too.
Also, you might want to do a bit of research on the modular rail system. When researching whether it'd work on a rifle-length gas system, I saw a couple people complaining about the rails being extremely difficult to mount without removing the entire handguard, which may or may not also require you to remove the gas block and flash hider. Some people might be okay with that, but I don't know if I'm one of them.