I'm wondering if there is a high capacity mag for the M&P 9mm (full size). I know there are for Glocks, but I haven't found one for the M&P yet.
I did find an extension that adds 5 rounds to a normal mag, so it's 17+5(+1 in chamber). But from the reviews it looks like it is cheaply made.
Extended Mag Base Pad Spring S&W M&P 9mm +6 40 S&W +5 Nylon Black
Does anyone know of any? or any good quality extensions?