SunsetInsert for the Glock Gen1-3 20 & 21 - Does not fit the SF. (Will not hold an extra round with the G-21) The SunSet Insert will store one round, batteries, tools, keep dust or debris out of the grip cavity, and guide the magazine into the magazine well for a faster reload. Fits flush with the magazine floor plate.
Greetings: I own a Gen 2 & a Gen 3 Glock 21. This insert fits well & looks great in my Gen 2. It fills the grip void nicely & adds a good although small additional storage compartment. Also make a nice slide ramp into the slide pocket. However, It is too large to install in my Gen 3. I do not recommend this particular one for a Gen 3. But I love it in my Gen 2. I probably misread the application table for this when I ordered it. I must be more diligent in reading the fine print on my next order.