Don't use PSA stuff. Try finding Bulgarian or Russian. If it hurts the bank to much just go the south Carolina shooter supply.
You need to figure out what type of mags work with your AK.
I must be totally misunderstanding your statement.
What would the barrel extension have Anything to do with the feed ramps. You making it sound like they may have the barrel extension in the wrong spot. Pics would help
Sadly most Bulgarian parts are pricey but could be found. Your not going to find them all in one spot.
You could always go https://www.carolinashooterssupply.com/ they should have everything but its US stuff.
I will list a few below and wish you good luck...
Twice in one day. Goodness.
Still pricey. A lot of AK builders are back logged months to a year. Most builders would charge around $350+.
Another cost is parts. You going with cheaper and easier to find US parts or Bulgarian or Russian? Russian part a stupid money, Bulgarian are not cheap but...
I have an AK that needs to be refinished.
I need it blasted. I've been able to remove most of the finish with acetone. But unfortunately there's still trouble spots.
Any recommendations would be a huge help.