Very good set up. It is billet which is nice and the upper and rail are virtually one piece. This will be great for an SPR type build, you will not have to worry about running out of room on the upper for mounting a higher power optic. I like how the lower rail comes off for barrel maintenence. The forward assist/brass deflector area is a little funky and bulky, but thats not much of an issue. The lug holes can sometimes be a tight fit on many lowers. Sometimes REALLY tight. Some people love this, others not so much. But over all it is an awesom upper/rail. I think you'll like it.