Nice pistol! Congrats!
If you picked it up at Greensboro Guns, it belonged to a recently departed friend of mine - hence the new mag spring. But I had also given him two LE mags for it.
If that is the same gun, it came into the shop in a paper bag. A young ladys father was going into assisted living, IIRC. I set it aside in the office, intending to buy it. But my friend stopped by and fell in love with it. So it went home with him. It was in very good shape.
Enjoy that fine Mini gun. Direct descendant of the Devel pistols made by Charlie Kelsey. Regards 18DAI