People forget its polymer - American Tactical Imports AR-15 Stripped Poly Hybrid Upper Receiver

Bought a on my hybrid 2 3 years ago after about 3000 rounds while out rabbit hunting in 10 degree weather the front take down pin aluminum insert completely snapped off the polymer.... Could be the cold temps and imacpt of the bolt but the warranty was long up. Bought this to replace upper. It is polymer so not aluminum but needed it to match up with original lower. For that purpose it works great fit perfectly and functions great after 300 rounds. If you know what you want it for or what its built for you'll be fine. That being said I have not and will not purchase amother polymer ar platform unless it in 9mm