I tried one of the two, new MecGar magazines that I hoped would work with my 18.9 LDA, but it didn't work - with the slide off, it looked like the magazine locked in correctly - the top round in the new magazine looked pretty much the same as the top round in a known good magazine - it could be that the difference in how far back the feedlips are cut on the new magazine - attached pictures below - the first pic is of the new magazine that did not work correctly - but at the range with the slide back on, the round in the chamber wasn't extracted all the way - it appeared to be "stuck" coming out on the next round in the magazine - picture below - looking at it again, it could well be that the extractor isn't doing it's job correctly - I'll have to look at that potential issue again.
At this point, I'm getting kinda frustrated and I'm thinking seriously of just selling the gun to someone that can make it work reliably again - my skills (and patience) with this one are about exhausted.
Works OK - https://drive.google.com/open?id=13G...6mRahWPWqyF9C1
Works OK - https://drive.google.com/open?id=1ax...ihfsbr6yGlim5q
New mag - does NOT work - https://drive.google.com/open?id=1JW...ipXSVvyqueGyru
Round not extracted - https://drive.google.com/open?id=1ew...h_GbLI4SFarf0YIMG_4563.jpg
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