A quick review showing the fit and quality of the ProMag industries 10 rd mag for the Shield in 9mm. I ran into some problems with the spacer being too large not allowing the magazine to probably seat itself into the mag well. With a little bit of sanding fixed this issue. With a few sharp edges and a slight lack of texturing the mag is still worth its $28 in cost.
promagindustries.com/smith-wesson/623-smi-28-smith-wesson-shield-933-10-rd-blue-steel-magazine.html