MK IV Series 80 Gold Cup Sight problem

[steve bliek]

I have a new gold cup with only 400 rounds through it. During my league shoot yesterday, the rear sight leaf pin (#35 in the diagram) worked loose and caused me to have a disastrous 9 misses before I figured out what happened to my aim.

The pin was all the way out but I was able to reinsert it with a tiny screwdriver blade tip. It went in with hardly any force and my concern is that this will happen again. The pistol is new (12/06) and although I can probably fix it with a drop of sealant over the hole, I feel COLT should fix it. I am open to opinion as to what people in this forum would do. Please comment.

[Joni Lynn]

You could slightly peen the ends of the pin to try and hold it in position. Another trick is to place a small bend in the center of the pin which will also hold it in place somewhat but may also cause difficulty during insertion.
The pin in mine gave me a problem and I used a solid pin with that small bend in it.
If you ever place the gun in a mechanicla rest like a Ransom rest those roll pins tend to sheer.

[Hunter]

I believe if you call Colt customer service they will send you a solid pin and it does have the bend in it as Joni described. It is an easy fix.

[steve bliek]

Hunter, I called Colt and was given very good customer service. They sent me 2 pins with the bend as you described. I asked if this was a common problem and was told that with only 400 rounds fired, this was a rare occurrence. Anyway, I'm happy this was the cause of my rough score at the range and not a brain malfunction.