Works for multiple handguns - Strike Industries MP 9mm/.40 Full Size 6 Round Extended Magazine Plate

Got several of these bumper style base plate extensions for less than $14 each. So far I've made them function on Ruger SR40 and SR9 series, SW M&P40 and M&P9 series, Walther PPQ M2 9mm (may work on 40sw version but I have no way to verify in person). Tried it out on SW SD40VE but the baseplate angle is very different between the SDVE and the M&P so this makes the SDVE look like a pony with one hoof up and back. Functions on the SDVE but looks very weird.