I have learned the hard way to AVOID ProMag magazines.
I bought 2 at Academy in sealed packages, with a sticker for my Ruger 93, and BOTH are very difficult to insert into the grip, and can only be removed by removing the slide and pushing down from the top.
Academy took them back.
A few other that I bought online for other pistols either did not fit properly, or had frequent FTF's. They were not worth returning.
Even though the package says that they are "Made in USA" and have a lifetime guarantee, contacting ProMag customer service and getting a response is almost impossible.
If someone has had success with a ProMag in a 945 or any other pistol, more power to ya', but I have been burned by EVERY ProMag that I ever bought.