Adds one to two extra rounds to Glock Gen 4 magazines.
- For use on Generation 4 Sub-Compact, Mid, and Full Size high capacity Full Metal Lined Glock magazines.
- Increases the capacity of 9mm magazines by 2 rounds. Increases the capacity of 40 SW, 357 SIG by 2 rounds and 45GAP magazines by 1 round. Will not fit the 10mm or 45ACP models.
- This magazine extension replaces the original floor plate and internal locking plate.
- These units alter the capacity of High Capacity Full Metal Lined Glock magazines.
- They are made from High Impact Polymer and withstand drop tests at temperatures from -20 F to 350 F.