G19 Gen3-4 barrel compatibility?

[awp_101]

I'm gathering parts for a mostly non-Glock G19 Gen 3 experiment. I started looking around to see if there are any differences in the barrels because my plan to use my G4 slide failed miserably when it didn't fit the GGP frame. If I can use my Gen4 barrel, great! If not I need to start looking for barrels.

It looks like most manufacturers list their barrels as 1-5 compatible and I've seen one reference stating the Glock Armorer's Manual doesn't call out different Gen3-4 barrels (but I haven't looked in my copy yet to verify).

So has anyone run into any issues using a G4 barrel in a G3?

Thanks!

[Darth_Uno]

19’s are all the same from Gen 1-5.
Edit to add: the Gen 5’s are Marksman barrels, but all 19 barrels are interchangeable across all 5 gens. The Gen 5 17 has a proprietary barrel that isn’t compatible with 1-4.

[awp_101]

Excellent, thanks!

[rd62]

Is there any appreciable improvement to be seen with the use of a Gen 5 "marksman" barrel in a lesser Gen 19?

[Xhado]

Is there any appreciable improvement to be seen with the use of a Gen 5 "marksman" barrel in a lesser Gen 19?

My Gen 5s out shoot my Gen 3s with KKM barrels. I should try putting one in a Gen3 to see if the accuracy is maintained or if there's more to it.