From, 3-D printed PM plastic magazine extension.

Designed for single-stack 9mm models, adds +2 round capacity. 

Has switch for easier magazine removal using standard PM release.

Made in Russia.

Note 1: not recommended to drop the magazine plate on hard floors as plastic may crack, since it is thin in some areas due to the PM's design. This issue will be resolved by the end of summer.

Note 2: magazines with plastic followers may need slight modification/filing for proper compatibility with the magazine plate. Thick followers may get stuck, make sure the follower travels all the way down freely before loading. 

PM Magazine Extension (single stack)