I have a 15 year old and a 11 year old who need to hunt with me. I need to get them each a rifle but the budget is limiting. I have a co-worker who loaned me a gun that seems like some kind of military rifle be also provided about 500 rounds of ammo. The gun has no scope it is open sighted. It is stamped "Russian M44 7.62 X 54R" It looks to be in decent condition (safe to fire)But what is it and what kind of effective range should I expect it to have for my son to hunt. Also open sights are adjusted up and down no windage (Correct)???