This would be a Mig 3. They very bullet-fast, thanks to being stream-lined & lightly armed. That was also it's weakness. 2 30 calibres & 1 50 caliber. It was a joy to fly, though. I own one, the aircraft.
I agree, it looks like a cool airplane, BUT it was very unstable in flight, and its armament, 2 30 cals & 1 50 cal were NO WHERE near enough to compete in the swirling dogfights that ingulfed Stalingrad.
Ahh indeed, in terms of stability and armament the Mig-5 and Mig-7 was much better, but by the time the Mig-7 went into production there wasn't really a need for the high altitude interceptor it was designed to be.