I just went to a gunshow and got a argentina hi-power 9mm.  As far as I know they're pretty much the same as an ARCUS-94.  Am I right?  Are they comparable quality?

I am having feeding problems with it, however.  I think it's the magazine's problem, or perhaps a weak ejector spring.  I don't think I'll be able to get a new magazine to try out until Monday.  Quite often a spent shell will get caught in the ejection port (which, with my very limited experience, sounds like a weak ejector spring), and sometimes a spent casing will eject but a new round will not get fed in (which sounds to me like a weak magazine spring).  The hammer will fall forward as normal, but there is no round in the chamber.  Another thing that happens often is that a round will get caught halfway into the chamber, and I have to pull the slide back a tiny bit and let it go to get the round in the chamber.

Do these things sound like a bad gun, or a bad magazine?  Other than those things, the gun is in very nice condition with no dings, scratches, etc., and it is quite accurate and comfortable and has smooth action.

magazine spring