Maybe for airsoft guns, but not for firearms - NcSTAR 1.25 in Quick Release Sling Swivel

I purchased several of these QD sling swivels for sling mounts on law enforcement rifles. They were made of metal and appear to be very similar to other ones we have. The other manufacturers sell them for $12-$20. I did not want to spend a lot of money for 20 sling swivels.
I purchased these about 4 months ago. I noticed at least one where the ball bearing came out. When I went to my first firearms training with two of these swivels, one at each end, I noticed the push button had popped out and a bearing was out, and the base was sliding back and forth, causing the gap to be seen where it met both ends of the metal.
Basically, they pulled apart, and I had not even put much stress on them.
I think they are cheap metal, I know they are cheap metal, and would not use them for firearms that I would not want to drop. I would only use them for airsoft guns.