Posted: 10/5/2014 11:07:43 PM EDT
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I picked up a gold cup commander a month or so ago and it has the occasional failure to feed. While messing with it today I noticed that if I dry fire it and hold the trigger back and cycle the slide it hangs up at the rearmost point in its travel. It does not do this when the trigger is not depressed. Im pretty sure this is slowing it down enough to cause the failures to feed. Ive tried different ammo and mags and also removed the full length guide rod the previous owner had in it and put a regular gi style guide rod and plug. any ideas?
obligatory pics: 
I have no idea who did the custom stuff on it. One of these days im going to change it back to a regular slide stop, a flat non mag well mainspring housing, and a non extended safety. |
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It is the disconnector. The "speed bump" and it is worse on Commanders, because of the shortened recoil stroke almost has it start it's forward travel at thye "speed bump." Less slide momentum.
Check PART III & IV of my series, here (and what I did to alleviate it): Commander |
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Quoted:
new recoil spring. Quoted:
new recoil spring. I tried this before i posted here, it made it marginally better but didn't totally fix the issue. Quoted:
It is the disconnector. The "speed bump" and it is worse on Commanders, because of the shortened recoil stroke almost has it start it's forward travel at thye "speed bump." Less slide momentum. Check PART III & IV of my series, here (and what I did to alleviate it): Commander This was the problem, Thank you! Compared it to the slide on my newer std colt commander and they were noticably different. bottom of the slide on the gold cup commander: 
bottom of the slide on the standard commander: 
after about a minute with a small flat file it hand cycles much smoother now, I just need to take it out and test fire it! |
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Consider adding a little oil to the disconnector area also, as I found that helped quite a bit and glad I could help  When I detail-strip/clean/lube, I use grease to hold the disconnector/sear together and in place for pinning, as well as the Series 80 safety levers. This has the side effect of maintaining lubrication of these parts for smoother operation. IDK about the little ramp you cut - the lower edge of the breech face has to catch the case head to push it out of the mag when loading. I guess since Colt did it on the other Commander its okay, but hopefully you only did a minor cut. If you start to get override without loading, you'll know why. In any event, a detail-strip, clean and lube is always good for operation. |
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You know, its possible they simply neglected to make that cut during production. Stranger things have happened. Its possible, from what I can tell all the gold cup commanders were made in the early to mid 90s which wasn't necessarily the pinnicale of quality for colt. I ran 5 mags through it and had 1 failure to feed. Which is way better than before. I'll mess with it a little more and it should be 100%. |