Smith & Wesson M&P Base Pad and Insert only for 9mm/.40 and .45
For High Capacity magazines only.
Will not work for ten round magazines.
Not For Sale In California
Models: M&P 9mm/.40 and .45
Base Pad and spring only
We recommend using an extended spring with the 9mm/.40 Base Pad.
Extended Base Pad, adds 3 rounds in M&P .45
5 rounds in 9mm
Extended Base Pad and locking insert