Or you can just go to autozone or the likes and borrow a puller (u shaped with a bolt in the center). I beat the s#&@ out of my lower and it would not budge. Luckily I was replacing it because it would not have been reusable. Went and borrowed the puller from autozone and it took less than 3 minutes. When it "popped" it was like a firecracker went off...as a matter of fact I thought the tool had broke or something. It was in there good!