Double fire

[BPTactical]

I saw a Colt Gold Cup do a full auto mag dump on a good friend with the second mag he put in it. Turned out before he got it the sear was modified just a tad too much. Surprised the hell out of both of us.

A mag dump on a 1911 will surprise the shit out of you!
Typical culprit on a 1911 mag dump is a short disconnector.
Easy safety check every 1911 owner should know:
With a CLEAR weapon and no magazine pull the trigger so the hammer falls. Keeping the trigger fully depressed retract the slide fully and let it go. Do not ease the slide forward, let it return to battery under the force of the recoil spring.
The hammer must remain in the fully cocked position, even with the trigger pulled. This tells you the disconnector is functioning correctly and sear engagement is adequate.
Hammer follow is bad on any firearm but on a 1911 it can be disastrous.
This test is a MUST for anyone inspecting a used 1911. Just be courteous to the owner and tell them you would like to perform this test prior to doing it.
Letting a slide slam closed on an empty chamber on a 1911 is bad JuJu and a poor practice, it causes the sear nose to bounce against the hammer and can destroy a nice trigger job if done enough.
Unfortunately to check for proper disconnector function / sear engagement it is a necessary evil.