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You are watching: Gen 4 slide on gen 3 frame


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Is it safe to have a Gen 4 upper on a Gen 3 lower?Are there any issues and how is the Gen 3 and Gen 4 frame (frame only, not parts) different?
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Reactions:Buckshot Barry
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No. Not for a G17gen4 upper onto a G17gen3 lower. The recoil spring area of the G17Gen4"s slide is too large for the Gen3"s frame.
(former) Glock & 1911 Armorer; usually carrying a Glock, but sometimes, instead, some other brand. LEO, now retired.Glocks currently owned: G43, G26gen3, G19gen5, G17gen5, G34gen4, G23gen3, G30SF
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http://www.katifund.org/threads/glock-23-recoil-spring-assembly-gen3-vs-gen4.1404237/There"s a pic showing the difference in post #5.
Ok, so the upper (frame) I have is clearly a Gen 3, BUT the serial # (according to glock when I asked them) is a Gen 4?! The upper has been having serious malfunctions lately.
Feel free to start from the beginning and develop a list of questions. Pictures can also help.What you (VANESSA) is calling an "upper" is unclear to those of us who have read & responded so far. "Upper" isn"t usually used in describing a semiauto handgun, but if someone does use that terminology, then I"d interpret it as the slide assembly. I think of the "frame" as the receiver or the lower portion of the semiauto handgun.The initial question was answered. The comments in Post #5 seem to be taking this thread in an entirely different direction, but they"re statements and not questions. Feel free to elaborate.

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(former) Glock & 1911 Armorer; usually carrying a Glock, but sometimes, instead, some other brand. LEO, now retired.Glocks currently owned: G43, G26gen3, G19gen5, G17gen5, G34gen4, G23gen3, G30SF
The OP does not appear to have enough familiarity with Glocks to know what even major sub-assemblies are called. This could become a very frustrating thread for knowledgeable respondents.
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