Received my magazine and before attempting to seat it in my gun I performed a thorough examination. The magazine was sufficiently rigid around the feed lips and magazine body and overall build quality was equal to a Polish arsenal magazine. The problem arose when I attempted to seat it one of the cut outs on the front tip of the magazine was not cut deep enough. From what I read the magazine design for the P-64 was revised around 1970 so that the feed lips were longer. if your gun was made before then magazines of the long feed lip pattern will not work. My gun was made in 1968 so sure enough, when I attempted to slam it home it wouldn't budge, I retriever file from the garage and proceeded to reprofile the front of the magazine. I was eventually able to slam the magazine home; however, Pulling the magazine out was difficult! The magazine fit the magazine well TIGHT! After playing with the gun and magazine I was at least able to loosen it up somewhat. Also. don't even think of lubing the mag body to help it slip out. Oil just makes the magazine more sticky. I'm thinking that continuing to play with it will get it to loosen up.

After reading the reviews I hesitated to order one of these. But could not find one in stock anywhere else. From the reviews it seems like they were of better quality 3-4 years ago. Shipping was extremely fast and it arrived a day before they said it would. The magazine looked good out of the box but after putting a few snap-caps in it and trying to rack the slid it stopped less than halfway back. Comparing with the factory original this magazine is a fraction of a inch taller and the front of the feed lips came to a squared off point. The factory magazine feed lips are rounded off in this area. Also the magazine catch area was angled instead of squared off. After taking a file and correcting these areas I was able to rack the slide and run 5 snap-caps through. I loaded up the 2 magazines ( original and new) and went out to my range. The original ran all six and locked the slide back on the last round. The new had 1 ftf and didn't lock the slide back on the last round. This is a sign of a weak spring and when loading it I noticed it was much weaker than the original but I had changed out the spring in the original for a wolf spring and thought that was why. I had the factory spring from the original magazine so I installed it in this new magazine. The factory spring was longer and stronger than the spring that came in this magazine. After changing the spring it ran all 6 with no problems and locked the slide back on the last round. The steal in these magazines seems on the soft side and I don't know how durable it will be. Time will tell.