Another Glock 19 question

[centuryan]

I have a Gen 3 Glock 19 that has the fish gill look. I thought it was a gen 3 thing but have seen other gen 3 19's that had the straight look. What is the difference???

 

[maadi47]

Glock came out with the gen3 regular, gen3 rtf which had rough frame and straight serrations, and for about 8 months prior to the gen4 they offered the gne3 rtf2 with fish gills. I also have one of these. No real big difference just another variation.