I have used ProMags 10 rounders for my Para P14 and they work well even though they don't seem/look well made. I probably would not get anything but factory hi-caps for my LCP.
JMHOFWIW
Richard
PS: Wasn't trying to be mean just wondering if they might work! I don't have a mean bone in my body....but I carry a lot along with me wherever I go! LOL