Hey guys. So my friend is selling his old gun. It's an A&k, but he doesn't know what the exact model is. I think it's an m16 since it has a fixed stock but I'm not sure. He doesn't know what the fps is either. The gun is 5 years old, the mag release is broken, and the stock needs a screw. He is asking 80. I think that's a good deal, I just wanted to make sure with you guys I'm not wasting money. This gun is going to be a loaner gun. I plan on shimming, grease, and new hop up. Do you think this is a smart move? Thanks!