Biggest question is are new gen3 barrels the same as gen 5 barrels?
So I've standardized on G19s at the moment, but due to available deals, I'm all over the map as far as gens... so:
I know gen 4-5 the only upper differences are:
1. slide
2. backplate
3. Drop safety/trigger safety plunger
4. sights
What about gen 3-4?
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