M&P RT13 FOLLOWER COMBO, utilizing an extra power 13 magazine spring. It will hold, on average, one less round than 11 coils, but it might be the solution if you don’t want to do mag spring maintenance. No Slide lock function. The follower Has a relief cut for the mag release.
We have tested this in a 170mm configuration utilizing a Taylor Freelance base pad. The capacity increase will vary depending on the base pad you use.
NOT COMPATIBLE WITH 10RD MAGS!