CCW-MFG's Glock 26 Magazine Extension for the Gen 4 & 5 adds +3 rounds of 9mm to your factory magazine.  This CCW-MEG26 extension has a fit/feel/quality one should expect following the lines of their factory firearm, only adding 5/8" to length over factory base pad.  The extension is easily installed and disassembled with one screw.  Users will also find a slot to compress the factory spring up inside for disassembly where other manufacturers require pinching the spring upon removal.
This extension is manufactured in the USA from 6061-T6 aircraft grade aluminum, engraved, and hard black anodized.