Numrich Gun Parts has a limited supply of 11-round magazines advertised to fit 4013TSW, 4054TSW, 4056TSW. They are priced at $46.80, a little more than the $15 I paid for my 9-round mags. I ordered one to give it a try. Does anyone here have experience with them?

The TSW's are the double stack mags and is yours is single stack mag? could be two different magazines SORRY!

The 4013 TSW uses the double stack mags. The 9 rounder is the same as a 6906 mag and the 11 rounder is the same mag as any other 11 round .40 mag. (4003, 4006, etc)

The OLD 4013's are Single Stack Magazines.

Those would most likely be the full size 4000 mag with the "plus2" adaptor on them. The adaptors were runing around $8-10 so that would make the mag $36-38, probably not a super bargin.

Shadow, mine is a double-stack, TSW, so it should fit.

The catalog indicates they are original S&W 11-round magazines; nothing is mentioned regarding the plus-2 adapter. I also compared the part numbers to the full-size 4000 series and they are different. Of course, this might just mean they are the same 4000-series mag with a different grip adapter!

S&W SKU #26248, $44.51 from Smith and Wesson.

Fits Models SW40C; SW40E; SW40F; SW40G; SW40GP; SW40P; SW40V; SW40VE; SW357 SIG.

Doesn't say anything about fitting a 4013TSW. Are you sure this mag would fit?

The discription doesn't match the mag and heading they show, I've got them in the past and they are the ones pictured for the TSW series compact forty. Only downside to them is they don't ride well in pouches and not the easiest to do fast reloads with, they're somewhat awkward. I keep one in the gun and the 9 rounders for reloads.

Why not just use the 6906 mags and swap followers for the blue .40 ones? This seems like the way to get your mags for about $12.

There is a slight difference in the feedlips. And some of the 6900 mags are wider and don't fit in the forty magwell. They might be OK for the range but I wouldn't use them in a defensive gun.