his unit adds capacity to Generation 4 Sub-Compact, Mid, and Full Size Glock high capacity magazines. This magazine extension replaces the original floor plate and internal locking plate and adds two rounds to a 9mm; two rounds to a 40SW and 357SIG, and one round to a 45GAP magazine. This unit will not fit the 10mm or 45ACP models.
- These units alter the capacity of High Capacity Full Metal Lined Glock magazines.
- These units add two rounds to the 9mm, two rounds to the 40SW and 357SIG and one round to the 45GAP models.
- They are made from High Impact Polymer and withstand drop tests at temperatures from -20 F to 350 F.