Fits M&P Shield 9mm and 9mm 2.0.
For use with .40 S&W 1.0 and 2.0 use factory spring
Not compatible with Shield 9mm EZ
M&P Shield mag extension adds 2 rounds to both the factory 7 and 8rd magazines
Uses factory sleeve when used with the 8rd magazine
Tool free, easy installation
Custom engineered spring
Optimal ergonomics and texture for recoil control
Made in USA
California Compliant
Uses factory follower & body (Not Included)
Adds 1rd and requires use of factory spring for Shield .40 S&W