Series 80
I'm also one of the guys who likes the Series 80 system, mainly for
peace of mind during Con-One carry...but after a lot of testing and
trying to create "what if" scenarios, I've come to the conclusion that
the 1911 is no more...and no less safe than it is without it.
In order for the pistol to discharge hands-off, the sear and or hammer hooks and the half-cock notch would all have to break at the same
instant, and even then, I'd be willing to bet that the thumb safety
would slow the hammer enough to prevent a discharge...assuming
that the plunger and spring, and the firing pin spring were in good order.
There are three safety devices in place. The thumb safety blocks the
sear...The grip safety blocks the trigger, and the half-cock backs them up
and makes pulling the trigger necessary to fire the pistol, with or without
the Series 80 system.
I've never had a Series 80 system fail to perform, and only seen one
that had a problem. This was due to crud in the plunger hole that
interfered with free movement of the plunger and firing pin. Quickly
resolved with a teardown and a can of Gunk Carb Medic. The
guy had fried about 25,000 rounds of amo that had been handloaded with
cast bullets. Nasty stuff.
The drawbacks of the Series 80 system is that it's an unnecessary
complication in the gun, and hence, subject to problems associated
with gadgetry, even though the chances are slight. The other one is
ease of maintenance in the field in that it takes longer to detail strip
the gun for cleaning and the chance of a small part loss. My advice is
to spend 4 bucks for the frame shim just in case. I have one with
each operational Series 80 pistol that I own in a hollowed-out
area of the grip. Cheap insurance.
Cheers all!
Tuner