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Old 05-14-2008, 07:18   #1
Coogan
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Caliber Marking Variations on Glock Pistols

Starting this off - I will modify as new info comes to light. It is not 100% (by a long shot), so if you know something, post here!



9x19

1st Variation - 9x19 on slide only (Austrian Proofed G17,G17L, G18 and G19, 1st and 2nd Gen)

2nd Variation - 9x19 on slide and side of chamber (Early 2nd Gen G17, G17L, G18 and G19)

3rd Variation - 9x19 on slide and top of barrel (All late 2nd Gen 9mm Glocks and all 3rd Gen)


.40 I know that the .40 caliber Glocks had at least 3 variations.

1st Variation: was simply .40 on the slide and .40 on the side of the chamber.

2nd Variation: The caliber mark was changed to .40 SW and was marked on the slide and top of the chamber. The lowest serial number I have observed is a G23 SL prefix, the marking ended between the CCP and CER range.

3rd Variation: The caliber marking reverted to simply .40 on the slide and top of chamber.



.357 SIG - two variations. I do not have any idea of the transition range.

1st Variation: .357 SIG on slide and top of barrel. CDZ-prefixed G31s are known to have this marking. These may be one of the rarest standard production variations to exist.

2nd Variation: .357 on slide and top of barrel.



10mm Auto - two variations. The first variant is within the double alpha prefix.

1st Variaition: 10mm on slide and side of chamber. To at least the UW prefix.

2nd Variation: 10mm Auto on slide and top of chamber.

.45 ACP - Two variations

1st Variation: .45 Auto on slide, .45 on side of chamber (no Auto)

2nd Variation: .45 Auto on slide and top of chamber


.45 GAP Note that prototype G37s were marked .45 GLOCK on slide. I assume the top of the barrel was the same.

1st Variation - .45 G.A.P on slide and top of chamber

.380 Auto

Unknown at this time, but I assume that markings will coincide with the above in the appropriate date of manufacture range.
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Last edited by Coogan; 05-25-2010 at 07:22..
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Old 05-16-2008, 10:22   #2
gruntmedik
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My understanding is the 357 SIG was changed to 357 with the finger groove/rail frames.
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Old 10-12-2008, 15:06   #3
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Don't forget the 9x21, 9mmFX and 7.8x21AC
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