Futo,
I bought some 9mm Pro-mags from Sportsman's Guide about a year ago for a Glock 17/34. They were, um, "interesting"!
1) One mag spit out loaded rounds!
- Put loaded mag in pistol, rack slide, one or two loaded rounds fly out, one loaded round may or may not chamber. Slide may or may not close.
- Get round chambered and fire. Empty is ejected smartly, one or two loaded rounds ejected dumbly. Operator swears loudly. Bystanders point and laugh.
2) One mag loved its little bullets. Wouldn't part with them. Even when requested by slide attempting to go forward. Even when operator applied "push/slap/blows" (with verbal reinforcement) to rear of slide.
3) Some mags held the slide back (on empty) sometimes - maybe. If the slide was locked back when mag was inserted smartly, the slide usually slammed home - sometimes with a round chambered, sometimes not, sometimes only partially home depending upon how many rounds flew out the top or tried to get into the chamber at the same time.
There's more, but the story is too hideous and painful to continue. I had a double-handful of the danged mags. (Quantity discount. Sure wasn't a "quality" discount!)
I knew I couldn't afford factory magazines so I decided to attempt repairs.
I disassembled one mag and found the inside had more curves and bumps than the Rockettes chorus line. I applied some gentle work with a file (a little bastard, I believe) and changed the Jane Mansfield interior into "early Twiggy".
That improved the operation of the magazine to "semi-trustworthy" - good enough for range work and classes. So now I have one hi-cap Pro-Mag that works (three more "under construction").
Would I stake my life on that magazine? No way, buddy! I carry a .45!
[This message has been edited by Dennis (edited July 28, 1999).]