45 auto mag compatibility 2nd-3rd gen

[slanto3000]

Hello all. I have a question regarding the compatibility of 645 mags in 4505/4506 series. Also do you guys know who ships mags to Canada

 

[handgunner356]

There have been at least four revisions to the 645/4500 mags, the newest have square indents in the feedlips and black followers. All work in either gun.