10 Round magazines WILL NOT work with this model of mag-well. If 10 round capacity magazines are primarily used, this product is not recommended. 

Aluminum Magwell 

Model: PRO Plus Magwell 

Fits: Gen 3/4  Glock 17 17L 22 24 31 34 35 37 

Brand new  

Product Description: 

Weight: 35g 
Designed to fit both Gen 3 and 4 Glock frames which 
features a solid 1-piece design. 
Gen4 back straps may need to be modified if used. 
Compatible Glock models (17, 17L, 22, 24, 31, 34, 35 and 37) 
10 Round magazines WILL NOT work with this model of mag-well. If 10 round capacity magazines are primarily used, this product is not recommended. 

One piece 6061 aluminum design 
Type III anodized finish 
Kit includes Magwell body, mounting screw and wrench