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I would like to find a gunsmith willing to take a crack at fixing mine.

I would probably just cut my losses and to sell it as scrap.
I don't think there is a gunsmith that can fix it. All of the problems seem to be rearward of the trigger. This pistol has been discussed muzzle to mag. Some of the pistols were never made reliable nor replaced..they sit in safes. I would never consider one for self defense....but I do like projects like this for fooling around with.

Is there another pistol anywhere that has no rails and depends on the striker/striker channel to guide the rear movement/alignment of the slide? $51 offer for one still stands. ;) 1917
 

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I know that you said, that you have failure to eject 30% of the time, is this the only problem that you need addressed or are there more. I know that a failure to feed problem could be a broken striker pin, it stays protruding out of the slide, and when the next round gets ramped up, the little nub sticking out, prevents the round from moving up into position.
As far as failure to eject or extract, you would have to look real close at the extractor, the extractor spring and bolt, and the ejector itself. The 9mm round has plenty of pressure to achieve all of this, but if the extractor is slipping off of the spent casing before it hits the ejector, and flipping it out, then a wore extractor part or even a part that was never within spec could be the cause. You could buy these extractor parts, they are pretty easy to change, and see if that takes care of the issue.
Meho, we have discussed all of these issues in great detail. Some pistols work....many don't. A 9mm round might generate plenty of recoil energy in most firearms but this one has a piston that delays and reduces that recoil energy. That has always seemed a bit of a difficult engineering challenge to me. Not that the concept might not work. The original pistol had four rings on the piston. That got cut to two rings if I remember correctly. Adding to the complexity concerning function....a buildup of dirt on the piston, dirt in the piston chamber, fouling of the gas port, wear of the port, then 115 gr rounds vs 124 gr vs 148 gr, etc. This seems like a tricky bit of engineering to solve.

Then things like mags dropping out of the pistol while firing, misfeeds, the striker not getting caught with no indication that you don't have a cocked striker, safety falling out, firing pin block falling out, slide spring being jammed inside the striker cup, trigger spring breaking, striker spring breaking, striker slamming into the primer of a chambered live round when it is not caught on a short stroke, sheared off counter plates, a recall for something, broken strikers including the shearing off of the striker hook.....yep, the pistol looks good and feels so good in the hand. But I sure couldn't trust one for self defense. This is far more complex than an issue with the extractor/ejector.

I don't understand the reasoning behind the layout of the whole striker design. It's not like Walther can't make a proper, fully functional and reliable striker system. Why are there no rails to guide the rear of the slide? The striker assembly running in the striker channel is responsible for that job...and it doesn't seem like a good way to accomplish it. But what do I know? 1917
 
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