Great quality and even better customer service - Aero Precision M4E1 Threaded Assembled Upper Receiver

First time buying an upper and after hearing so much about Aeros quality and with great pricing on OP, I landed on this beauty. The quality and build was great from my first impressions. I did have a slight issue with the upper not receiving the gas tube. It wouldn’t go in. One slipped by Aero in QC check. No worries. Optics Planet had my back. No hassle return/exchange. The new replacement came in and I had no issue with that one. Overall, I had a great experience, great deal and quality product, (once the one was replaced).

I would recommend OP.com and Aero parts hands down to all my friends and family.