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Old 01-10-2013, 07:14   #896
T-Rod45
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Join Date: Apr 2010
Location: CT
Posts: 1,111
Quote:
Originally Posted by SARDG View Post
The ONLY difference on SOME barrels is when a .357 barrel is used in SOME .40 cals and then must be ordered by frame S/N. This apparently only affects SOME pre-Cxx .40 cal serial numbers.

My Glock Armorer's parts list/will-fit info reflects no other difference in Gen3 and Gen4 barrels.

Gen4 RSAs wouldn't fit in a Gen3 slide. The barrel half moons are the same and fit Gen3 or Gen4 with the Gen-appropriate RSA in the correct slide. As an example, I have a Gen3 and a Gen4 G17 and the barrels and fit are the same when using the correct RSA appropriate to the slide in which they are inserted.
Thanks SARDG! That pretty much confirms what I've been researching for the past 2 days.
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