I was just re-united with my FIRST RIFLE. It is a 1965 Marlin 80G. My brother kept it when I got drafted in 1971. He recently died, and it was returned to me. Two questions. 1-The barrel needs to be replaced. Where can these be sourced? 2-Did all of these have "bull" barrels? This thing is built like a dump truck. I thought my S&W Model 15 M&P pistol was stout. Wow!