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I had to take mine apart when I first got it. The follower had fallen out of place or something so I had to reassemble everything. I also found in my sr-22 the back of the feed lips more left than right needed to be filed down. You could see the plastic getting peeled a bit by the bolt so I just filed those areas down.
Strange that the black dog drums are the best working .22 mags I have ever owned in my AR-15 but in a ruger 10-22 they are the worst I've ever owned. The conversion tower is hard to get working on a 10-22