I have a 14" AR that came with a maple ridge Handguard on it (custom build), it's nice. Smooth, no sharp edges.
I put a tna super m lok on my m and p 15 (and cut down the front sight block)
It works. Nothing 'wrong' with it. Get the adapter wrench thing tna sells for it to torque it.
Does have a weird noise from it when racking the charging handle.
Does have some somewhat sharp edges to it. As they advertise none are super sharp, but they are somewhat sharp. You wont cut yourself, but you can tell the price difference is a thing.
Finish does seem cheap. Will scratch easy I suspect.
I got a MDI SLR receiver set on january, I grabbed a 15" maple ridge handgaurd for it.
And their 18.6" barrel.
Hoping to have the majority of the remaining parts next weekend and start the build.
My non restricted MDI SLR I will be showing off at non ranges(camping, farm, etc) want the nice Handguard. Especially considering the cost of the receiver, and the rest of the parts I'm putting on it.
My m and mp15 with its 16" barrel and my other AR with the 14" barrel are both range blasters. Goes bang bang. New shooter love them. Not looking for show off points.
I guess depends what the rest of the parts your getting are.
If your looking for a budget build, then cheap out with the super, it does everything that is needed of a free float Handguard.
If you want a nice AR, get the marple ridge. (Or a quality one)