Sig Sauer 1911 10/12 (.22LR) 

This Magblock fits the Sig Sauer 1911 12 round .22LR magazines and will limit them to 10 rounds.  Easily installed in seconds by replacing the locking plate. It is held in place with spring tension alone or can be glued or epoxied if desired.

-Simplest way to make Sig Sauer 1911 .22 10/12 magazines.

-No modification to the magazine is required.

-Lightweight and will not interfere with magazine reliability.