[ormati]

40 to 357 conversion for G23?

Can this be done? Is it just a matter of the right conversion barrel?

Maybe just a 32 replacement barrel would work in the 23?

Or can't it be done at all?

If so, 357 or 40 mags? Are 357 and 40 mags identical?

Thanks

 

[Railsplitter]

40 to 357 conversion for G23?

Can this be done? Is it just a matter of the right conversion barrel?

Maybe just a 32 replacement barrel would work in the 23?

Or can't it be done at all?

If so, 357 or 40 mags? Are 357 and 40 mags identical?

Thanks

A barrel swap is all that is needed to convert a G23 to 357 Sig. Also G32 and G33 barrels can be used in a G27 with no problems.

 

[ormati]

A barrel swap is all that is needed to convert a G23 to 357 Sig. Also G32 and G33 barrels can be used in a G27 with no problems.

Thanks!

 

[pjanthony]

Not advised by Glock for most Gen-2 pistols. Gen 3 and 4, no problem.

 

[NO504ME]

Not advised by Glock for most Gen-2 pistols. Gen 3 and 4, no problem.

:agree: If You contact Glock directly they will want the serial number for your G23. Glock will not sell a .357 barrel for serial numbers produced before a certain date from what i understand. When i buy magazines for my G23's, I have both Gen3 and Gen4, I usually buy Glock 32 magazines if they are available and the same price and just use them for .40 and .357. I've never had a problem shooting .357 in any of my .40 magazines or .40 in my .357 magazines.

 

[Big Bird]

:agree: If You contact Glock directly they will want the serial number for your G23. Glock will not sell a .357 barrel for serial numbers produced before a certain date from what i understand. When i buy magazines for my G23's, I have both Gen3 and Gen4, I usually buy Glock 32 magazines if they are available and the same price and just use them for .40 and .357. I've never had a problem shooting .357 in any of my .40 magazines or .40 in my .357 magazines.

This is correct and my experience as well...

 

[pjanthony]

“Anything serial number CFFxxx or newer is good to go.“

https://www.glocktalk.com/threads/glock-23-2nd-gen-convert-to-357sig.964769/

 

[Sig M11]

I have a new G23, Gen 4 on the way...1st thing I am going to do is order an OEM 357 Sig barrel.

 

[Sig M11]

Are 357 and 40 mags identical?

No. From what I understand, the G32 mags have a different follower.

Will that be an issue. No. If you were going to make that set up your go to carry self defense gun...buy a G32 mag as your primary.

I also think the sights and the extractor are marginally different between the G23 and the G32.

Not significantly different, but different.

 

[G26-Has-my-6]

If you have a later model G23 as stated above, a G32 stock barrel from Glock is the best. They will ask for your serial number and they will let you know if your pistol is a problem.

in older threads about this topic it was mentioned by Mike-M that the ejector and rear sight needs to be changed as well.

Post 10:
https://www.glocktalk.com/threads/glock-23-to-357-sig.1509447/#post-21612719

 

[DrewBone]

Yep. "Paging Mike-M to the courtesy phone, please...Mike-M..."

 

[LostinTexas]

Barrel swap is all that you have to have. The case in 357 is necked down from a 40.
Many say that is it. There are those who will say to get dedicated 357 Sig mags, or at least the follower. If you want to put your life on the difference, chances are you won't notice. Do you want to take the chance? Some say no.
I've toyed with going to 357 Sig on several occasions, but just can't figure out what I'd gain. I really like the 40. If you load, it can be just about anything you want, from a cream puff to a sledgehammer of a round.

 

[pjanthony]

40 mags (get 357 mags for full 13rd reliability) and ejector, no problem

 

[slamdunc]

Barrel swap is all that you have to have. The case in 357 is necked down from a 40.
Many say that is it. There are those who will say to get dedicated 357 Sig mags, or at least the follower. If you want to put your life on the difference, chances are you won't notice. Do you want to take the chance? Some say no.
I've toyed with going to 357 Sig on several occasions, but just can't figure out what I'd gain. I really like the 40. If you load, it can be just about anything you want, from a cream puff to a sledgehammer of a round.

Exactly! I was sure that at least a dozen overthought posts would be in this thread before lunch—I was right.

Probably from people who read more than they shoot.

 

[Railsplitter]

:agree: If You contact Glock directly they will want the serial number for your G23. Glock will not sell a .357 barrel for serial numbers produced before a certain date from what i understand. When i buy magazines for my G23's, I have both Gen3 and Gen4, I usually buy Glock 32 magazines if they are available and the same price and just use them for .40 and .357. I've never had a problem shooting .357 in any of my .40 magazines or .40 in my .357 magazines.

These numbers you mentioned are in the gen 2 models very little overlap into the gen 3 models.

 

[Mike-M]

“Anything serial number CFFxxx or newer is good to go.

I'm not sure where that CFF information originated, but it is not correct.

Refer to Glock's parts order forms

https://us.glock.com/en/downloadable-materials

or to Glock's G32 barrel order page:

https://store.teamglock.com/barrel-g32-357.html

Very few Gen2 G22 and G23 pistols are approved for 357SIG barrels. Only Gen2 G23 pistols with serials CPU000US (imported March 1998) and greater are approved for use with a G32 barrel. That is very late in Gen2 G23 production. Glock usually refers to Gen2 models as "non-Finger Groove & Rail" models.

40 to 357 conversion for G23? Can this be done?

An OEM Gen4 G32 is EVERY part identical (except slide markings) to an OEM Gen4 G23 except:
1. G32 barrel 8665.
2. Glock rear sight of 6.9mm elevation instead of 6.5mm elevation.
3. Trigger Mechanism Housing 30561 with Ejector 30499 instead of TMH 28927 with Ejector 28926

An OEM pre-Gen4 G32 is EVERY part identical (except slide markings) to an OEM pre-Gen4 G23 except:
1. G32 barrel 8665.
2. Glock rear sight of 6.9mm elevation instead of 6.5mm elevation.

The Gen4 40SW Ejector 28926 and the Gen4 357SIG Ejector 30499 are identical except for a slight backward slope bottom to top of the tip face on Ejector 30499. This almost never makes any noticeable difference in ejection patterns. In fact, Gen4 357SIG Glocks used Ejector 28926 until early 2012.

Follower Rev. 9 40SW and Rev. 3 357SIG Magazines appear identical except for markings.

Follower Rev. 10 40SW and Rev. 4 357SIG Magazines appear identical except for markings.

 

[GIockGuy24]

The frame differences are additional metal reinforcement at the front of the frame, longer, stronger subcompact type frame rails and a longer ejector for the higher slide speed.

The early 357 Sig models all got the stronger frame rails that originally were only on the 26 and 27.

Later the 40 S&W models also received these frame rails and the longer 357 Sig ejector.

The early 9 round 27 magazines will take 10 rounds of 357 Sig for some reason.

The early 357 Sig magazines were shaped a bit differently at the feed lips, but this made them more prone to breaking and I think they wet to more of the 40 S&W magazine design later.

The early generation 2 23's do ot have the metal reinforcement and are a bad choice for 357 Sig.

The slightly later Gen 2 23's have the reinforcement, but standard frame rails.

These usually hold up fairly well in 357 Sig, but do not have the stronger frame rails of the later gen 2's.

The short ejector usually works alright in 357 Sig, especially in the 27, but also other 40 S&W models.

 

[1canvas]

Barrel swap is all that you have to have. The case in 357 is necked down from a 40.
Many say that is it. There are those who will say to get dedicated 357 Sig mags, or at least the follower. If you want to put your life on the difference, chances are you won't notice. Do you want to take the chance? Some say no.
I've toyed with going to 357 Sig on several occasions, but just can't figure out what I'd gain. I really like the 40. If you load, it can be just about anything you want, from a cream puff to a sledgehammer of a round.

I understand what your saying but for me for some reason I group much better with the 357Sig.
As far as performance on game the 357Sig seems to incapacitate quicker and the internal wound is a bit nastier, I’m talking Gold Dot and HST in both the .40 and 357Sig. By paper and gel the difference is minimal if at all.
I have a Gen4 23 and when I’m carrying it in the 357Sig I change the extractor and mags but I have shot hundreds of rounds with just a barrel swap with no issues.

 

[GlockFan7]

I considered a barrel swap for a while for my 23, then my OCD kicked in and I just bought the 32.

 

[Mike-M]

Barrel swap is all that you have to have.

The ONLY Glock pistols that convert completely and PROPERLY between 40SW and 357SIG with a barrel swap ONLY are PRE-Gen4 G27 and G33 pistols. Those are literally EVERY PART identical including sights to each other except for barrel and left-side Slide markings.

The Gen4 G27 and G33 are also the same EXCEPT for Ejector, as I explained in post #16.

The case in 357 is necked down from a 40.

The 357SIG case is derived from the 10mm Auto case, not 40SW.

There are those who will say to get dedicated 357 Sig mags, or at least the follower.

There is almost nothing more critical to the proper functioning of an auto-pistol than the Magazine. Glock OEM Magazines are dirt cheap inexpensive. My EDC is a Gen2.5 G27 (23 years old, my first Glock) that has been converted to 357SIG using an OEM G33 barrel. It works fine with 40SW Magazines but it is pure foolishness to NOT use proper 357SIG Magazines for EDC service in ANY pistol that serves serious purpose as a weapon.

One fact showing that a 357SIG round is NOT simply a necked-down 40SW round becomes apparent when a 7151/7165 Extension is attached to otherwise identical 40SW and 357SIG Magazines. According to explicit statements by Glock in its parts order forms (see post #16), that Extension adds TWO rounds to a 357SIG Magazine but only ONE round to a 40SW Magazine. Two additional rounds can in fact be inserted into that extended 40SW Magazine, but there have been many instances of such loaded Magazines later spontaneously disassembling the Floorplate from the tube. That is seldom considered a good thing to happen...ever.

I've toyed with going to 357 Sig on several occasions, but just can't figure out what I'd gain.

Well, here's a list that uses a G27 to G33 comparison that can be extended to all other 40SW and 357SIG Glock pistols as well:

-> Ballistics
A G27 firing 40SW 180-gr JHP can typically produce MV=975 ft/s, ME=380 ft•lbf, and PF=176 kgr•ft/s.

A G33 firing Underwood 357SIG 125-gr JHP can produce MV=1410 ft/s, ME=552 ft•lbf, and PF=176 kgr•ft/s.

Both loadings above produce about the same recoil based on power factor PF (momentum), but the 357SIG load produces 45 percent greater muzzle energy. Bullet trajectory is flatter as well due to the higher velocity which allows less bullet drop over any specific distance. These are significant ballistic performance advantages.

-> Feed Reliability
The bottleneck 357SIG cartridge feeds more reliably than the staight-wall 40SW cartridge.

-> Chamber Support
Unlike the OEM G27 barrel, the OEM G33 barrel chamber provides perfect 100-percent cartridge case support, even above the feed ramp, along with the tightest of Glock OEM chambers. A 357SIG cartridge case in an OEM chamber will fire form slightly in the shoulder area, but otherwise appear to be an unfired case.