Question: what is the difference between a gen 3 and 4 glock?
Answer: The next of the Glock 19 Gen 4 upgrades to the grip was its texture. The newer grip has a rougher texture than the Glock 19 Generation 3 model. Knowing that many shooters textured the grips on their Glock Gen 3 for a better feel, Glock made it a feature and a noticeable difference between Glock 19 Gen 3 and Gen 4.