Froneck
Titanium
- Joined
- Dec 4, 2010
- Location
- McClure, PA 17059
I have a Feinwerkbau AW93, from the day I got it (new) I had lock back issues. The slide quite often would not lock back after last round is fired. Not a major problem though I'm told many AW93 owners have that problem. It's of concern to me since when shooting competition it is noticeable that the slide must be pulled back and locked implying that the last round might not have been shot. In addition on some occasions it would lock back but that catch on the very edge and easily slip and slide closes.
I attempted to find the problem thinking the slide did not recoil the full distance so that little time was allowed for the catch to engage. All my attempts to fix the problem failed! Until I noticed that with an empty magazine in the gun and slide pulled back the catch would be raised by the tab on the magazine follower and fully engage. However I noticed that if the slide was pulled back to the end of the stroke the notch not being long enough would strike the catch and force it down. Looking at the slide the black finish on the slide is not worn off even in areas that contact other parts of the pistol, even the surface of the catch and the notch are still black BUT that area that strikes the catch when the slide is at the rear of the travel is well worn and brightly shinning steel. I took a swiss pattern file that had cutting surface only on the side needed and extended the length of the notch forward so that when the slide is completely back the frontal edge of the notch will not hit the catch. The problem did not return! I assume the problem was that fast speed of the slide striking the catch forcing the follower down quite a bit, enough to delay upward force on the catch causing repeated failure. I also blued the filed surface. After 100 last round firings the blueing is not worn nor has the lock back failed.
I attempted to find the problem thinking the slide did not recoil the full distance so that little time was allowed for the catch to engage. All my attempts to fix the problem failed! Until I noticed that with an empty magazine in the gun and slide pulled back the catch would be raised by the tab on the magazine follower and fully engage. However I noticed that if the slide was pulled back to the end of the stroke the notch not being long enough would strike the catch and force it down. Looking at the slide the black finish on the slide is not worn off even in areas that contact other parts of the pistol, even the surface of the catch and the notch are still black BUT that area that strikes the catch when the slide is at the rear of the travel is well worn and brightly shinning steel. I took a swiss pattern file that had cutting surface only on the side needed and extended the length of the notch forward so that when the slide is completely back the frontal edge of the notch will not hit the catch. The problem did not return! I assume the problem was that fast speed of the slide striking the catch forcing the follower down quite a bit, enough to delay upward force on the catch causing repeated failure. I also blued the filed surface. After 100 last round firings the blueing is not worn nor has the lock back failed.