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Edited to add: If this is going to be a night stand pistol I would recommend to never put a WML on a Glock chambered in 40S&W.
I have to disagree with Deputydave, here. I’m not saying some places didn’t have issues and I’m definitely not saying you shouldn’t verify function and reliability with your weapon system. You absolutely must make sure your setup is going to work, before putting it into any sort of duty capacity.

I went to the Academy, in 2008, when .40 S&W was the most carried sidearm caliber, for street cops. Several of my classmates carried G22’s and G23’s with WML’s and had no problems.

Later that year, I was assigned a G22.3 with a Streamlight M3 WML. This GLOCK was well worn, when I got it (I believe it was built around 2003). Never an issue. I bought it, when it was replaced with a Gen4 G22, in February 2013.

The G22.4 was immediately paired with a new Streamlight TLR-1s. Again. Never an issue.

WML’s are very popular with street cops, here. The two PD’s also carried G22’s. They never had problems with the ones who carried WML’s.

I haven’t shot my G23.5 with a WML, but my two G22’s and my G23.3 (bought in 2004) have never had problems. The G23.3 has had a few different lights on it and none have induced malfunctions. A lot of my training mags are from prior to 2004 and I have new mags I use and every age, in between.

Again, not saying some batches of GLOCKs or some specific combinations of x, y, and z just won’t work, just that I’ve only ever read about it, on the internet. My personal experience has yielded success, in these matters.
 
Im glad to see WML addressed for the Ops consideration. Hopefully some may share lack of case support in the barrel and parts breakage as well. My tenure with the 27’s and 22’s was only three years in competition and I feel biased, possibly comments will come shortly.
 
I have to disagree with Deputydave, here. I’m not saying some places didn’t have issues and I’m definitely not saying you shouldn’t verify function and reliability with your weapon system. You absolutely must make sure your setup is going to work, before putting it into any sort of duty capacity.

I went to the Academy, in 2008, when .40 S&W was the most carried sidearm caliber, for street cops. Several of my classmates carried G22’s and G23’s with WML’s and had no problems.

Later that year, I was assigned a G22.3 with a Streamlight M3 WML. This GLOCK was well worn, when I got it (I believe it was built around 2003). Never an issue. I bought it, when it was replaced with a Gen4 G22, in February 2013.

The G22.4 was immediately paired with a new Streamlight TLR-1s. Again. Never an issue.

WML’s are very popular with street cops, here. The two PD’s also carried G22’s. They never had problems with the ones who carried WML’s.

I haven’t shot my G23.5 with a WML, but my two G22’s and my G23.3 (bought in 2004) have never had problems. The G23.3 has had a few different lights on it and none have induced malfunctions. A lot of my training mags are from prior to 2004 and I have new mags I use and every age, in between.

Again, not saying some batches of GLOCKs or some specific combinations of x, y, and z just won’t work, just that I’ve only ever read about it, on the internet. My personal experience has yielded success, in these matters.
That's fine. You'll see in the thread I linked that there have been serious issues, one incident, as I mentioned, was local with multiple G22's jamming up in a high profile police action shooting. After extensive testing, Glock admitted there are issues and in at least two cases replaced all those 40's with Glock's in different calibers. And some testing revealed that some pistols had immediate issues, some didn't and some didn't but later developed issues. It is good information to be aware of when making the decision to use one. :)
 
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Normally, I would say Gen3 for all things Glock, but not for the .40 S&W pistols.

1.) Screw-tightened weapons mounted lights may or may not work on your particular pistol. Glock half-@ssed addressed it by starting to use stronger magazine springs and admonishing users to always use fresh recoil spring assemblies, but it doesn't fix them all; and

2.) The Gen4 was the first generation to give the .40s their own recoil spring assembly. All previous generations used the 9mm recoil spring assembly, which led to battering and slide peening and the pistol outrunning the magazine with a screw-tightened WML attached. Glock's position was that the slide peening was "normal" (which by strictest interpretation of the word it was, since all Glock .40s did it), but it wasn't exactly ideal.

For .40s, my answer is Gen4 or Gen5 (if you don't mind the added bulk of the wider slide).
 
I have G23 in G3 and G2. I like the looks of the G2 better, but they seem to function the same. If I had to choose just one it would be the G3 because of conversion barrels. I was told it wasn't a good idea to use the .357 SIG conversion barrel in a G2.
Depends on whether it's a two pin or a 3 pin gun.

Just for clarification... on Glock Gen 2 22s and 23s conversion to 357sig, the # of pins doesn't really have anything to do with Glock approval of conversion, however 2 pin guns would definitely not be in the approved serial number range.

Approved Conversion to 357sig:
G22 serial number CNX or after
G23 serial number CPU of after

My understanding is there are only a couple thousand Gen2 22s and 23s that get the ok for the conversion to 357sig that were produced right before the switch was made to the Gen 3 frames.
 
I was a big Gen 3 fan until I got a Gen 4, of all the features on the Gen 4, the duel spring RSA and the modular back strap feature were the selling points for me, I had a Gen 5-17 but just couldn't get used to the lack of finger grooves.

years ago, I went thru the "full size/compact/sub compact" process, trading between the different models trying to determine what was my best carry handgun, for me, full size got uncomfortable on a long day of carry IWB and every sub compact I carried got X-Grips on the full size mags used for back up which made them harder to conceal and draw from a duel mag pouch.

I had a Gen 3-19 at the time and a friend fired it and just had to have it so I went looking for a Gen 4-32, 357 Sig is my personal favorite handgun caliber, but I came across a Gen 4-23 being sold by a local LEO who's department was making the switch to 9mm and got it for a real good price with the intent of just dropping a 32 barrel in it, which I did, but after comparing the 357 Sig with 40 S&W, I stayed with the 40 S&W, recoil impulse seems to me to be easier managed and I'm marginally quicker on shot recovery.

I've also purchased a Storm Lake 40 to 9mm conversion barrel and an Advantage Arms 22 LR conversion kit, I've lost track of the round count in the 9mm conversion barrel and have well over 5000 rounds in the AA kit.

so with the versatility of the Glock platform, the features of the Gen 4 and that the 23 just fits me to a "T", I don't think I could do better.
 
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I love everything about the gen 4's, but I guess most of it as a personal preference. As far as having issues with the new recoil spring, I believe that was only on the 9mm's, and they have more than resolved that by now. It was a Glock 19 that I just traded in for the 23, and I had no issues whatsoever with the recoil spring on that. the gen 4 recoil spring, to me, made a very noticeable difference on the 23.
 
Gen 3 guns for me, when applicable/possible. My Glock 43 obviously isn't gen 3.

However, if I could, I'd love to try a Gen 4 gun. The Gen 5 guns do not interest me, though, they do tout improvements.
 
That's fine. You'll see in the thread I linked that there have been serious issues, one incident, as I mentioned, was local with multiple G22's jamming up in a high profile police action shooting. After extensive testing, Glock admitted there are issues and in at least two cases replaced all those 40's with Glock's in different calibers. And some testing revealed that some pistols had immediate issues, some didn't and some didn't but later developed issues. It is good information to be aware of when making the decision to use one. :)
Well, just got back from reading that thread, again (I had contributed to that one and followed it as it progressed).


Again, not saying it didn’t happen or that every individual weapon system shouldn’t be vetted.

From what I see, it’s an isolated issue, even among agencies that had multiple issues. Without knowing the serial numbers and particulars of the weapon mounted light and how tightly it was mounted, it’s hard for me to entirely discount what I’ve had and seen so much success with. I would really like to read the particulars, if someone was keeping a database. It seems most of the “WML‘s on GLOCKs are bad“ are talking of isolated incidents and repeating what they have heard (not speaking from personal experience).

From a statistical standpoint, what percent of GLOCKs in 40 caliber had or developed issues? How does that number compare to other firearms?

From following the forums and having a vested interest in GLOCK performance, I agree that the most likely problems, of all the GLOCKs ever made, come from those sold in .40 caliber. From the early two-pin issues, the “kabooms”, and the isolated WML issues, the .40 calibers pull more than their fair share. I would guess the .357 Sig calibered weapons would also suffer at a higher rate, but there aren’t enough of them on the market, to matter. There are hundreds or thousands of .40 caliber GLOCKs, for every one that has “.357” stamped on it.

The one aspect that I would like to test is shooting vertically. This isn’t possible, at most ranges and as such is something I have not tested. I’m trying to think of a bullet trap I can lay under to shoot upwards, safely, for at least several hundred rounds. This would be fun to test multiple platforms on….

For me, I will continue to have as much faith as can be placed on a man-made object in my proven G22’s and G23. I have multiplied GLOCK options available, including a new G19X and a G45 (and a couple of G19’s). Maybe my G19X is a bad one…
I stopped counting rounds through my G23.3, after 6,000 (most of those w/o a WML), that was around 2007-2008. I put thousands of rounds through both of my G22’s (almost always with WML’s). They have proven to be reliable and accurate.

From the thread you referenced, you may recall I actually said G19X. For someone wanting a “full size” sidearm and they aren’t already vested in a particular caliber or weapon system, the 9mm GLOCKs is generally the direction I recommend. Though, there are many other great choices.
 
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Gen 3 with (FPF) for me.
953925

I got this one with some extras for $400 PC (Pre Covid) and if I could only own one Glock, this would be it.
I put the 10 rd mags in a box with other 10 rounders I have gotten over the years, you never know if/when they may be needed.
 
for a nightstand by all means get you a gen 5. that slide soaks up the recoil. I cannot stop handling and shooting mine, it is a dream.

and I will carry it come winter, possibly even in all months, when holsters become more available. it is the perfect package for me. no finger grooves, nice beefy slide to help w/ some recoil management, better trigger. 13+1 on deck of good 180gr HP, what better platform exists. FWIW I am a die hard .40 fan boy.

I prefer Gen 4 to Gen 3 for the grip texture, but again, night stand gun, not so much a consideration. the gen 3 are noticebaly more slippery shooting in the summer heat, though.
 
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