I don't remember who makes it, I lost the original paperwork that came with it but I am sure it told in there what the manufacturer was. There are a number of this exact rifle under different brands: Winchester, Crossman, etc.
Normally I wouldn't have even bought it, but I found it on sale at WallyWorld for around $79 and couldn't pass it up. I like the fact that it is a very solid piece, and rips the CRAP outta pop cans. That, and as I mentioned, I can shoot it in my yard without the neighbors bitching.