12 Round Magazine Upgrade Kit for M&P Shield Compact 22LR custom color tumbler 20oz We also offer the option

We also offer the option of a lower priced solid piece made from Onyx (a Carbon Fiber impregnated Nylon)

The stock recessed knob is both at an awkward position hard to get ones hands into to generate the strength needed

We laser engrave and ship your one-of-a-kind tumbler fast

They mount with a very slim profile and can be mounted underneath items or vertically behind or between furniture

Simply send us the files in 3D format (or provide a direct download link) and we will 3D print it on our high-end SLA resin printer

12 Round Magazine Upgrade Kit for M&P Shield Compact 22LR custom color tumbler 20oz We also offer the optionThis upgrade kit provides the capability for the a single magazine of a M&P Shield Compact 22LR to increase from (10) to (12) without extending the outside of the magazine and with no loss of functionality such as the slide not staying back after the last round is fired. This retains the use of the stock spring. If one just wants a magazine to hold (11) for free, look at the picture regarding modifying the lower follower. The 3D comparison shows how