Nicely machined upper receiver - Aero Precision M4E1 Threaded 14.5in 5.56 Mid-Length w/ ATLAS S-ONE Handguard Complete Upper Receiver with Flash Hider

This Aero Precision upper makes the third different manufacturer upper I've tried. Cost wise it sits in the middle out of the three. The upper came packaged well and arrived with no machining blemishes or shipping damage. I have mated the Aero upper with a Anderson lower and the fit is amazing. The Aero upper fits snug and secure to the lower like it came from factory that way. The Aero upper fits my S&W M&P15 lower better than that firearms own upper. Took it out to range today and put 200rds through it with no cycling or FTF issues. Overall a very well manufactured upper receiver. Although it's listed as a complete upper, it doesn't come with BCG or charging handle.