Quote:
Originally Posted by Michael Zeleny
No flaws anywhere to be seen; lock open is sporadic.
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With the upper removed, and the sear bar removed does the toggle move smoothly for the full length of its travel? or is there any hesitation or roughness?
Failure to lock open with only one round in the chamber and an empty magazine inserted indicates either a holdopen that has restricted movement (rubbing on the right grip), or that the mainspring force is too heavy. This is the first problem you need to solve before delving into magazine/feeding issues.
1. Check that the magazine button has no rubbing issues at the top of its travel in an empty magazine.
2. Check that the right grip is not preventing the magazine button from moving to the full up position because it is improperly inletted on the inside, or may be slightly oversize on the inside as a bakelite mold error, causing friction and preventing the holdopen from restraining the slide when firing that single round. You can test this by removing the upper and inserting an empty magazine and watching the holdopen. If it hesitates, even a little, it is rubbing the grip. There should be full motion of the holdopen doing this exercise with the right grip removed. The action should be identical with the right grip installed.
3. Install the mainspring from your LP.08 and see how that affects operation. The same results? or not?
4. Obtain an aftermarket mainspring from Wolff that is 16 LBs or less, and start removing approximately a half turn of spring one snip at a time until you are functioning with 115 Winchester White Box. Do this until you achieve lock open 100% of the time.
Anxious to hear how this exercise plays out...
