1942 BYF Mixmaster won't shoot!

[sheepherder]

Here's a pic of the parts on a P-08 -



From your pics, your ejector seems intact. As for the extractor, it does get full of crud.

Field strip the gun, use a paperclip or small rod [drill bit] to push the extractor pin out of the breechblock. The pin should not be difficult to remove. Hold your finger over the extractor so the spring doesn't fly out. Clean everything out good, use the paperclip/rod/drill to put it back together. Check the extractor nose for chips. Clean out the notch in the barrel where it fits in.