Got my 300 Blackout upper from Noveske a few weeks ago and finally got a chance to shoot it last night at an indoor range thanks to a friend. First off the upper is very nicely made and came with a feww adaptors for a forward grip,flashlight and what ever other paraphenalia you might want.Handguard is round,ventilated and made of aluminium and barreli lenght is 16" with a brake whose name escapes me at the moment. The charging handle is large but not too large and can be operated with one finger. Fired only 20 rounds out of it and accuracy is good though the 25 yd range is a bit short. virtually no recoil and its bark is quite mild for a 30 caliber round. The lower is a S&W lower whose trigger left something to be desired,but I have another lower with a McCormick trigger that I will try at a later date. Brass is made from 223 brass and I made 500 cases over the last 2 weeks,if you decide to get one of these uppers get or borrow a saws all you'll be glad you did. My only complaint even with a starting load of H110 and a generic 110 gr round nose bullet this upper throws brass a long way and gouges up the rim on the brass. I"ve ordered a heavier buffer spring and a H2 buffer that will hopefully slow down the bolt and not gouge up the brass. All in all I'd buy another upper from Noveske again once my checking account recouperates.