Well made despite poor description - Guntec USA AR-15 9mm Dedicated Billet Upper Receiver

I received this bare upper yesterday and pulled my 8" 9mm barrel off of a multi cal upper and installed it to this one. Threads were nice and all edges are smooth. I use midwest industries handguards and the anti rotation wings that extend onto the sides of most receivers will not allow the handguard to be installed. I cut the extended tabs off of the back of my handguard, filed it flush to the top rail and it installed nicely after that. I use a red dot that attaches to both the upper receiver and the handguard rail so that will do the job of preventing the handguard from moving but if I used a farther back set optic or irons I would have been a little frustrated and worried about stability. The description is also not accurate as it states "designed as a bolt action rifle" and "This upper also features an adjustable gas block" which it clearly does not be 9mm barrels do not utilize a gas block at all. I purchased it anyway because I am experienced enough to know this was not accurate and I was making any adjustments to get it running. Overall it is a nicely machined piece and I am happy with the final assembly just be aware of what you are looking at and be ready to modify a hand guard that is not flush on the back with the top rail.