Welcome to the forum!
Mags are made by Mec-Gar, one of the premier magazine companies in the world. They just happen to be Italian.
Did you clean your LCP thoroughly before you shot it? Take a good look at the extractor tooth under a good light and make sure it looks clean and sharp, no chips, etc. Take a toothbrush and clean any crud out of the tooth/hook area, to make sure it can grasp the shell rim. You might check the tension by seeing if the extractor will hold a shell firmly against the breech face with no help from you.
If all that checks out a call to Ruger might be in order.
-- Sam