Arredondo Basepad & Spring for S&W M&P in 9mm & 40 S&W
- For High Capacity magazines only.
- Will not work for ten round magazines.
- Models: M&P 9mm & .40 S&W
- Extended Base Pad, add’s 5 rounds in 9mm and 4 rounds in .40
- Overall length with new base is 140mm
- Kit includes extended Base Pad, locking insert and +10% power spring.