"Just to be clear, this is NOT a +1/+2 mag extension. It is a spacer that attaches to a magazine. If you have a compact, it looks like the larger mag is meant for the smaller gun. I'd rather think of this as a grip extension. Be sure you know what your buying."
"These perform exactly as expected. They are a slide on 'X-tension'. I picked up 4 of these for some 13 round .45 mags and they all were perfect in color, shape and design."