vgerik1234,
Welcome to the wild world of M&P pistols! Just that fact that you know what a Type II malfunction is puts you ahead of 90% of pistol owners. The explanation of your concerns was lucid and accurate. This allows us to properly address them. More often than not we get descriptions like this, "The thing that goes into that other thing isn't right. What's wrong?" So, this is a breath of fresh air.
Quote:
Originally Posted by vgerik1234
3. Spring Setting:
When I disassemble the slide, I noticed that the spring doesn’t sit flush on the little guide shelf(?name?) that exists for it.
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There is nothing wrong with your gun. All semi-auto pistols with a mono block chamber design work like this. In fact, the only reason that 1/4 moon cut out exists in the barrel lug is to assist with assembling the barrel and recoil spring assembly (RSA) into the slide.
This is not the best picture, but it shows what's going on inside the gun when fully assembled:
When the gun is assembled and the take down lever is in the closed position, the flat portion of the lever is forward. This is what the RSA sits against and pushes on as the gun operates normally. So, as the slide moves, the RSA tends to migrate down toward the frame. This is good and part of the design. It actually helps hold everything together.
So, don't worry about the RSA not being flush with the notch in the barrel lug when you field strip the gun. They all do that.
About the failure to extract, this could be more of an issue. The M&P
should work with any round you buy off the shelf. Alas, not all do. Let us know how it goes with the other rounds you've ordered.
Polishing the feeding ramp is one of those myths that has perpetuated throughout semi-auto history. It might help, but usually it only serves to make the user feel like they've done something. I've seen more guns damaged while trying this than I have seen improved.
If you polish the ramp, it won't hurt. But I must emphasize
polish. Use something like Mother's polish to do it. Anything more aggressive or abrasive could alter the feed ramp and make things worse rather than better. Chances are the ramp is fine as it came from the factory.
hdskullfire2 (Steve),
Those pictures are HUGE! As I type this they are still loading and I have relatively fast internet. Consider resizing them. They don't need to be any bigger than 1,000 pixels wide.