Great product. - FM Products Foxtrot Mike Colt FM-9 Monolithic 9mm Upper Receiver

This upper was a joy to shoot. I shot it at 50 yards, with iron sights in low light conditions. Accuracy and reliability are 5 stars. The fit and finish of this product is also 5 stars. I own several AR style weapons, and this is probably my second favorite overall. I highly recommend if you’re looking for a quality 9mm upper.