It's a very good sart, I'd say. It's mostly accurate, except for some details. Here are some of the things I think should be revised: 1. Rear sight base. It's a bit weirdly modeled - mainly, the sight elevation slope doesn't look right. Also, you are missing the gas tube locking lever. Here are some ref pictures that…
it looks to me that this might already have a normal map applied, but it definitely would be helpful to see some wires. I say that it looks like its already been baked because those look like seams along the outer edges and those circular indents appear to flatten out as you look down the beam. Also i don't believe you…