I bought 2 x Ruger Mk-I magazines thinking they'd fit my "Standard" .22 pistol.
They appear to be almost identical except that the round spring knob thing is on the WRONG SIDE of the magazine, thus preventing it from loading into the "Standard".
1. Is there a special "Standard" magazine, and where can I buy them?
2. Can I modify the Mk-I to fit the standard?