Hey, Lennyjoe. Stephen's site is one that I spend quite a bit of time at already. It's where I found out when my gun was made.
Oh, and Sistema1927... All of Brownell's extractors are external. But that's okay. Cylinder & Slide makes the internal ones for Hi-Powers.
I doubt I'll ever need a new one though. From what I've been reading, the internal extractors on the old Hi-Powers tended to break most often when people did something stupid... Like drop the slide on a cartridge in the chamber rather than load it from the mag. Still, it's nice to know I can get another if the old one dies.
Also, the guns were made with internal extractors for what, 25 years or more? You'd think it would have been re-designed much sooner if they were really that weak. I suspect that the change to an external extractor was made as much to ease manufacturing as anything else.
Oh, and before I forget, I've run a mag full of ammo through the gun. 124 gr. hollow points.
It ran without a hitch and put all the holes where I aimed them.
Pretty good for a 40+ year old gun, huh?
J.C.