Gen 3 vs. Gen 5 GLOCK Frames: What's Different?

What are some of the key differences between Gen 3, and Polymer80 frames, and OEM Gen 5 GLOCK frames? We're comparing them both here, side by side.

LINKS:
- Grab a GLOCK frame parts kit! https://www.80-lower.com/glock-lower-parts-springs/

- Upgrade with a custom GLOCK slide here: https://www.80-lower.com/complete-glock-slide/