1/4" is so miniscule it's not even noticeable. You wouldn't even notice it.So they are lying...????? I mean it's still cool but not worth the money to me. If I need more rounds just carry my PDP Compact that holds 15 lol
Smith & Wesson Shield 9mm +2 MagGuts™-High Capacity Magazine Conversion
This conversion adds just 1/4″ to the length of the magazine and adds 2 rounds! The extra 1/4″ does little to decrease the ability to conceal while adding just enough for a firm pinky grip.
This is our third version of the Shield MagGuts™ conversion and it is better than ever! We developed a revised ZeeSpring™ profile that adds just a little more spring force while compressing to a shorter height providing space for the new polymer follower. The lock plate is now attached to the spring as one piece for simplicity and ease of assembly. The short MagGuts extension with the OEM-like follower and ZeeSpring™ combine to get you two extra rounds in a super reliable magazine.
-Converts the 7 round magazine to 9 rounds while keeping it shorter than the S&W 8 round magazine
-Convert the 8 round magazine to 10 rounds by adding only 1/4″
-Maintains reliable feed and slide lock operation
-Easy to install
-Compatible with original S&W 9mm magazines only.
-Not compatible with Shield .40
-Patented & Patent Pending.
But it def isn't worth the money.. Maybe if you want to have 1 mag that has 10rds.