I bought 5, 4 of them give nose-up jams and will need the lips adjusted. I don't find that a problem compared to the price of the OEMs.
Also, most of them did not drop/insert freely and needed tweaking with a plastic mallet (small) to fit well. The steel is thin and low quality and I would not use for carry purposes as any bump or pressure could distort them causing failures. I got mine for plinking, and if they work better after adjustments, I'm fine with that.
You do get what you pay for most times. Wish these were OEM surplus though, THAT would be a bargain!