both hammers have a shelf, its just the 70 has a hook on the end of it.
if you were to put the 70 hammer into half cock then squeeze the trigger nothing happens, then you must fully cock it and release it forward by pulling the trigger and thumbing it down.
if you pick up a 80 gun, and half cock it then pull the trigger the hammer will CLICK back forward, so you dont have to fully cock it and thumb it down.
that hook on the end of the 70 hammer prevents the hammer from clicking back forward or reseting it, which is prolly much safer than thumbing it down from full cock.
the 80 hammer doesnt interact with the firing pin safety stuff
Do you just file the notch off so it's flush like the series 80 style? What happens if you take a little to much off? I just bought a retro Kings hammer(s-70 stainless) for a series 80- colt 1991a1.
Any input will be appreciated. RB
Robo, that hammer should work fine in your 80s pistol the way it is. Leave the captive notch as is.
The location of the half cock ledge is different between the 70s and 80s hammers. The 80s is more of a 1/4 cock, the 70s closer to 1/2. If you filed off the captive notch on a 70s hammer, there is a real possibility of the gun firing if the hammer is dropped from that position. IMHO