THE BEST SIDE OF GOLD CUP TROPHY COLT 45

I had been asking yourself a similar issue.  Reduced amp TIG welding may very well be the answer to simply welding the roll marks.  What's the perpose of copper?Yes, I'm certain the upper receiver is Colt, combined with the BCG.  It is de facto the barrel which is questionable to me.I figured someone need to do it prior to the information looks