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Glock 23
- Thread starter Youradolt
- Start date
"Reinforced" Glock frames have 3 pins. All reasonably modern, except maybe the first year of production, 40S&W Glocks have 3 pins. At some point it became cheaper to make them all the same, and 9mm Glocks got 3 pins too.
--EasyD
Rob Boudrie
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Sorry, correct facts, wrong answer to the question at hand.
Your observation about the pins is basically correct, but is not what is being referred to with reference to the 357 Sig round in Glock frames. Early Glock 9's had a single pin up front rather than two holding in the locking block. When it comes to determining if a Glock 40 can take a .357Seg barrel, this is not the deciding factor - unless you took an old 9mm frame, your 40 will have the frame with two locking block pins (I am not 100% certain, but I believe all single pin locking block frames were 9mms, and perhaps the not for import 380s).
The Glock frame is steel inside injection molded polymer. The configuration of this interior steep portion has been changed on newer Glocks so that the guide ring on the slide (the part with the little hold the the guide rod slides through) hits metal, not polymer. If you look at the contact point in the frame, you will see metal on the newer Glocks and polymer on the older ones.
Yes, if you have a single pin in your locking block you can count on it being the older style not rated for .357. The converse is not true, as you cannot take the presence of two locking block pins as conclusive proof the frame improvement needed for 357 durability is present in your frame.
IMHO there is no trouble putting a .357sig barrel into any Glock 40, or putting a 40 into a 357sig Glock.
The barrels are interchangeable, the slides are not IIRC
The .40 and .357 sig rounds are almost identical on paper. The .357 Sig is supposed to be a nicer round, but the ammo is more expensive
Just make sure that you are not chambering and ejecting the same round. There is a school of thought that because of the ramp design in the 40 the bullet can get pushed into the case causing over pressurization and the dreaded Glock KB if it is rechambered more than once. I allow myself 2 cycles then it is gone. YMMV
There are some nice aftermarket barrels for the Glock 40 and 357 sig guns With the aftermarkets you can shoot reloads, which is a absolute no no with a Glock barrel.
I have a KKM in my .40 and it has performed without issue.
The barrels are interchangeable, the slides are not IIRC
The .40 and .357 sig rounds are almost identical on paper. The .357 Sig is supposed to be a nicer round, but the ammo is more expensive
Just make sure that you are not chambering and ejecting the same round. There is a school of thought that because of the ramp design in the 40 the bullet can get pushed into the case causing over pressurization and the dreaded Glock KB if it is rechambered more than once. I allow myself 2 cycles then it is gone. YMMV
There are some nice aftermarket barrels for the Glock 40 and 357 sig guns With the aftermarkets you can shoot reloads, which is a absolute no no with a Glock barrel.
I have a KKM in my .40 and it has performed without issue.
Get a Sig.
Rob Boudrie
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It's kind of hard to describe, but if you have the 357 sig compatible frame you'll see metal where the guide ring on the slide hits the frame when in full recoil
I've take the Glock factory armorer's course 4 times (certification renewals) and they never mentioned any such slide difference other than markings. Do you have a source for this info you can cite?
I will bow to your superior knowledge, I saw it mentioned on a site when i was researching the G31 purchase I was trying to make. I have a G22 already and was wondering if i could just swap the slides since I didn't want to buy another Crimson Trace laser for it. IIRC the post I read said one of the frames was beefier and wouldn't take the other slide, but the barrels are a drop in swap
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