Ok Im in Canada 1st
I have a colt RO634 semi auto 9mm with the 10.25" barrel all factory colt, with colt mags too
this rifle has started to fire 2 or 3 rounds per trigger pull, NOT GOOD
now i have put 3 DIFFERENT fire control groups in and still same problem
I have tried MANY types of factory and handloaded ammo still same problem
I need a colt 9mm expert could it be buffer or spring related??? bolt problems???
i really need to fix this i cant use the rifle as were not allowed to have this happen!
I am not a Colt 9mm expert, but I can sympathize with your problem, as my Colt did the same thing.
I replaced the trigger and the disconnector, and the problem went away. The trigger pull is not near as nice, but at least it only fires when I want it to!
For what it is worth, mine never fired more than 2 shots. My friend could fire it all day long and it would never double on him. It would double on me more often than not.
I have the regular Colt steel 9mm buffer. Since changing those 2 parts, no problems. I am afraid you will need the advice of an expert. Good luck.