FAB Defense FX-4310GR Glock 43 +4 Magazine Extension Gray Polymer

The FAB Defense FX-4310GR is a drop-in magazine extension for the Glock 43 that adds +4 rounds, bringing total capacity to 10 rounds when installed on a factory magazine. The unit is also compatible with the Glock 42 magazine. Molded from fiberglass reinforced polymer in a gray finish, it installs in place of the factory floor plate and reuses the original magazine spring for reliable feeding without any permanent modification.

Contoured finger indents are molded into the body to provide a positive, slip-resistant grip during rapid magazine changes, and the added length enables a full, secure grip on the handgun for shooters with larger hands. The extension can be removed at any time to restore the magazine to factory configuration.