This is unfired, I'm the second owner, according to my little research, it appears to be a full custom build utilizing a McMillan Bros. SINGLE SHOT ACTION, chambered in 50 BMG, along with a K&P fluted stainless HEAVY barrel, diameter is 1.5". The muzzle brake also appears to be a K&P product. Very light, crisp trigger. The rail and rings are unmarked, but hold an older Nightforce 8-32x56 optic. Everything is in stone mint conbdition, and comes with a heavy duty custom case as shown in the pictures. The gun itself weighs just under 35 lbs, and measures just over 60". LOP is a little over 14".. . No TRADES