FN 502 Magblock 10/15 (.22LR) 

This Magblock fits the FN 502 16 round .22LR magazines and will limit them to 10 rounds.  Easily installed in seconds and allows you to use the stock locking plate. It is held in place with spring tension alone or can be glued or epoxied if desired.

-Simplest way to make FN 502 .22LR 10/15 magazines.

-No modification to the magazine is required.

-Lightweight and will not interfere with magazine reliability.