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
• Easy installation, no Gunsmith required
• Fiberglass reinforced polymer construction

Compatibility:

• 8 Round, S&W M&P®9 SHIELD™ - original factory extend capacity magazine only!
• Will not work with factory installed Crimson Trace laser