CCW-MFG's Glock 43II Magazine Extension for the Glock 43 adds +2 rounds of 9mm to your factory magazine.  This CCW-MEG43II extension has a fit/feel/quality one should expect following the lines of their factory firearm, only adding   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 often require pinching of the sping upon removal.
This extension is manufactured in the USA from 6061-T6 aircraft grade aluminum, and hard black anodized.