I was recently trying to add some speed to my Glock 17 which I use for IPSC, by adding a trigger stop. Before making any firm investment, I just fitted a small piece of plastic to the back end of the trigger guard, and sanded of the excess, so that the trigger released just as it the trigger stop. The next thing I did was to take the gun to the firing range, where after firing two-three shots, on the subsequent shot the Glock went into full auto mode
and shot off 6-7 rounds.
I immediately removed the trigger stop and the problem disappeared.
There are the following observations:
1) I bought it second hand and it is equipped with a 3,5 lbs connector,
2) From what I can see the trigger housing does seem to be slightly altered/damaged
3) Without the trigger stop the gun functions fine.
I am doing something wrong here, - but what ? Any suggestions?