GMC saw multi purpose saw broken

Hey so I have a GMC saw that was sitting new in the box for a couple years. I have some old pallets and I started to cut off the nails. after the third nail the head broke off. Maybe because I was putting too much pressure. can this be fixed? welded? is it possible to pull this thing apart and find a replacement part? shattered that it broke after 30 seconds of use. I'm sure it was my fault for putting too much pressure. pictures in the link below



GMC broken saw head - Imgur