It says they are OEM for all the listed brands.
Are you just having a bad day?
The page shows brands they make magazines for. There are other after-market manufacturers for those same brands. It DOES say they are OEM that I can see on the page except for this one statement.
“We craft magazines for many of the world’s classic pistols - Browning Hi-Power, Luger P-08, and Walther PPK to name a few.”
That doesn’t say “for all the list above” that I can see.
Are you having a bad day?