BF-1-3 I think their the same.and I perchased mine from one of these trucks. Clean the grease off , find a pellet that run true and you got a pretty good gun for the price. Take note , The spring guide in back is made of plastic and after a few tins begins to crack and crumble apart falling down through the trigger opening. I custom made a replacement for it, no problems except for the TRIGGER.! For the price I suggest buying two, one for spare parts. This site sell them and a beeman AIR RIFLE. Rebuild kit package for the B3.
http://www.MajorSurplusNSurvival.com. Check out my pic. thats my B3 IN CAMO. The rabbit wanted to pose with gun and afterwards I invited in for dinner