hello my name is jake im new here and i have a rifle barrel im tryin to id. dont have my camera til tomorrow so cant put up pics yet. its 30 inches from muzzle to end of receiver threads, extractor cut out is on the top military looking sights, sights marked from 3 to 20. stamp on bottom says H&H....Holland&holland??? was thinkin of makin a coyote gun if its worth it.