I like it. Nice rail it sits nice against the Madbull Stag receiver. Its thin which is perfect for me because I have small hands. Super easy to install. Even if you don't have an AR gun wrench. It's held together by eight screws four 2mm hex and four flat heads. Easy to put on and off I would recommend lock-tight or something to scure the barrel nut because unlike the RIS II there isn't anything on the hand guard itself to keep it on straight a good push the wrong way can unscrew a loose barrel nut and the whole hand guard.
Monolithic better than the standard Omega rail which I also have.
QD sling mounts even though I don't have any still good to have.
Simple to assemble and to disassemble.
Nothing on the RIS to keep it from twisting (fixable with lock-tight on barrel nut, but not for me because I change my M4 like I change the TV channel so I don't like to use any.)
Did not fit my stock Echo 1 Stag upper but its threads are shot so might not be the RIS's fault.
Rating: [5 of 5 Stars!]