Last round jams:
The problem is very well documented in this post (
http://kahrtalk.com/showthread.php?t=1290 ) by gj47 in regards to his PM45:
"The malfunctions occurred on the last round fired and cannot be cleared quickly. Notice that the casing was pulled into the mag feedlips and wedged into mag and ejection port area. The mag cannot be removed until the casing is pried out. The feed lips of this mag are now bulged about 6 thousandths."
My fix as posted on another forum:
“I've had two major issues with my CW45 and modifications to the magazine have fixed both.
FWIW, the other problem began at about the 500 round mark; the last round would fail to eject cleanly: sometimes getting jammed back down into the magazine. What I found was that the magazine lip on the ejector side was tipping the last round in the magazine slightly upward and slightly off the extractor before it got to the ejector in the ejection cycle. When this happens the case often does not clear the ejection port and gets driven back down into the magazine or barley ejects (more like falls). With rounds still in the magazine, spent casing are (usually) held high enough by the following rounds that this would rarely happen.
To counter this (a new extractor and spring
might fix it), I decided to take some material off the magazine lip. I was pretty aggressive on the first magazine; I cycled a spent casing by hand and removed material until I felt the casing would stay in place long enough to hit the ejector. I took less off the next magazine and it seems to function fine. I imagine, with some patience and testing at different stages in the process that even less material would need to be removed. No more FTE issue with the modified magazines: also, they hold the rounds securely and I've had no feed issues with them (I've even dropped them a couple of times with no lost rounds).
Stock magazine and modified magazine (right):
Modified magazines: the second one done is in the background; the modification on it closely follows the contour of the stock feed lip on the other side of the magazine:
I'm not saying this will work for all; it's just something to consider if someone's gun is malfunctioning as described above (again, this just how I did it; not a "how to" article).”
to be continued...