[buzzsaw]

Mec-Gar S&W 59 series mags work in the P-11 EXCEPT the 17-rd version. It also looks like their 10-round one won't work, either. The ones with the diamond-shaped indentation will not fit a P-11. See: S&W Magazines - Mec-Gar USA Inc - Firearm Magazines The one on the far left is a 20-round. The only difference I can discern between them and an S&W 20-round is the lack of a S&W logo. It is obvious that Mec-Gar makes the 20-rounders for S&W. It works in the P-11, SUB-9 and P-15.

I have some of these: Smith & Wesson Model 59 Magazine
These work well in my P-11 and SUB-9 and appear to be well-made. However, they will not seat in my metal-framed P-15. In the future, I will buy Mec-Gar and genuine S&W to get mags that fit all of these Kel-Tecs.

buzzsaw