The MPS-12 allows modifying the original 8 round magazine of the M&P Shield into a full capacity 12 round magazine, all this without having to replace the original magazine spring.
Advantages:
+ 4 rounds for a total of 12 rounds in the magazine!
Innovative spring plate design, allows for the use of the original magazine spring
Enables a full grip on the handgun
Contoured finger indents for a firm grip during magazine manipulation
