Magazines for 39/39-2 will fit & function properly in the 439, 539 and 639 pistols. They will also lock in place and function properly in the 3913/3914/908/CS-9 pistols, but they will hang beyond the frame and look odd.

The 9-rd magazines for the 3906/3904 and 952 pistols will also work in ALL of the above listed pistols with a slightly different look as they have a plastic floor plate that looks different than the slim metal floorplate of the earlier 1st & 2nd Gen magazines.

The earlier 8-rd 39/39-2 magazines will not lock in place in the 3906/3904 and 952 pistols, they are a tad bit short.