The Trooper Mark III is an extraordinarily high quality revolver.
After Colt could no longer afford to make their older models with the hand assembled and fitted actions, they introduced the Mark III series guns.
These were specifically intended to be a stronger, more trouble-free revolver than the older models.
Master gunsmith Jerry Kuhnhausen said that these later Colt's were the strongest medium framed DA revolvers of all time.
The Mark III has only one weakness, and that is, if you dry fire the revolver, use snap caps.
If you dry fire empty, the firing pin "might" break, and this requires a trip back to Colt for replacement.
The job CANNOT be done locally due to the need for special support dies and a press to change the pin without damaging the the frame.
The Mark III was later upgraded slightly as the Trooper Mark V, and again as the King Cobra.
These are all very high quality, accurate revolvers, that are typically a step above the competing guns from S&W and Ruger.
The Trooper Mark III is often mis-identified as the original Colt Trooper.
The Mark III was made from 1969 to 1983. It was available in .357 Magnum, .22LR, and .22 Magnum.
Finishes were bright blue that puts current guns to shame, bright nickel, and a satin electroless nickel, also known as "Coltguard".
Barrel lengths were 4", 6" and 8".
There were two types of factory walnut Target grips.
The First type has a square butt, the last type has a rounded butt:
First type Trooper Mark III Target grips:
Second type Trooper Mark III Target grips: