9mm Loader S&W M&P Shield Ergonomic Print Optimized

Thanks to mighty_mace for the inspiration.
I have optimized this file for printing upside down without supports. Ergonomic features added, internal alignment feature added, sidewalls thinned to reduce bulkiness without sacrificing strength.
I had to over size the ID by about 0.030" to compensate for my printer which prints a bit wide. If your printer is calibrated to true size, reduce the model by 2-3%.