Product Overview For use on Glock M20,M21,M29,M40 and M41 Full Metal Lined Glock magazines. Increases the capacity of the magazine by 2 rounds. Incorporates fourth generation texture pattern. Reviews (2 reviews) Write a Review 2 Reviews Hide Reviews Show Reviews 5 Pearce +2 Extensions Posted by John on 31st Jan 2022 2 extra rounds of 10mm is always a good thing! 3 Love the Pearce grip bu the magazine extenders don’t fit Posted by Skip on 31st Jan 2022 The Pearce magazine grip is just what I wanted. It came packaged with the magazine expansion, which doesn’t fit so is useless to me.