This interesting firearm is an unfinished experimental double action revolver designed by Rob Roy to automatically eject the spent casing. It has a modified ejector rod catch and a specially machined, spring loading gate. It was made using a stripped down .357 magnum Colt revolver and has no sights. The modified barrel is essentially upside down and is marked "COLT 357/357 MAGNUM CTG" on the right side and has the one-line address on the left. The frame is only marked with the Rampant Colt on the left side towards the rear. It is fitted with checked walnut grips with silver Colt medallions. The underside of the grip panels is marked "0646". The rear grip strap is serrated. The barrel, cylinder, and trigger are blued, and the remaining components are bare stainless steel.

Very good as never completed. The gun retains 70% of the blue finish with the finish removed on nearly half of the barrel and a drag line on the cylinder. The bare metal has some spotting and a brown patina forming throughout. More work is necessary to make the firearm complete and functional. The grips are fine with crisp checkering, small chips on the lower edge, and handling type wear. Overall, this is a very unique prototype.