Glock 35 conversions

I have the same Glock. I haven't tried converting it, but I can say that my Glock 27 mags would reliably feed 9mm when I converted it.

You will need to use the correct conversion barrel AND the correct magazines for the caliber. And there is a chance that you will have to swap out the extractor and ejector for the correct caliber.

How picky are you on sight picture and impact?

I'm picky. In the end, it makes more sense to just buy a G34 to go along with the best auto pistol ever made. (G35)

Glock 17/34 mags should work perfectly in the 35.

I put a Lone Wolf 357 Sig barrel in my Glock 35 - I've only used it with 357 Sig mags or 40 mags with 357 followers.
My chrono averages for at least 5 shots
Glock 35 with 357 Sig Barrel
125 Gold Dot @ 1,399 fps / 543# KE
125 HST @ 1,415 fps / 556# KE
125 Ranger T @ 1,428 fps / 566# KE
125 PPU FPJ @ 1,461 fps / 593# KE

There is no such thing as a “conversion” barrel to switch to 357sig. A stock 357sig and .40 barrel are interchangeable between the two calibers. They also use the same extractor and ejector. They do have different followers, but I have had good luck just using .40 mags when shooting 357sig, and you get an extra round to boot if you just stick with the .40 followers.

For 9mm there are conversion barrels, and I have shot using .40 mags, but they didn’t feed super reliably. 9mm uses a different ejector, but should still work with the .40 ejector. Different extractor for the smaller 9mm too, but I’ve also shot 9mm using the .40 extractor. Wouldn’t trust my life to it though.

I have purchased a gen 2 23 that I only plan on shooting 9mm from, so I changed out the ejector and extractor to 9mm.

Dan-O said:

I have purchased a gen 2 23 that I only plan on shooting 9mm from,

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Why? I do not see the point of buying big and shooting small.

Dan-O said:

I have purchased a gen 2 23 that I only plan on shooting 9mm from, so I changed out the ejector and extractor to 9mm.

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FWIW see 4:44

Jim Watson said:

Why? I do not see the point of buying big and shooting small.

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G35/34 are basically the same gun. (I own multiples of both)

While Glock is normally way behind the bell curve. I dont see any issues with someone spending hundreds to save pennies..

I have a Glock 29 with a Storm Lake barrel to shoot .40 S&W and a Bar-Sto barrel for .357 SIG. The Bar-Sto took a little fitting but after that the conversion can be made by just swapping the barrels. I use the same magazines for all three cartridges. But all three are based on the same case.

wgp said:

Just acquired a Gen 4 Glock 35, in .40 S&W. I gather that I can also shoot 9mm or .357 SIG with only a replacement barrel, and that the .40 magazines that came with the pistol will handle the .357 rounds. Assume I need a different mag for 9mm. Someone who has some experience here, please educate me.

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You assume correctly, the .40 mags don't run well with 9mm. They can work with a few rounds in the mag, but not fully loaded. When you can get Magpul 9mm Glock mags for $10, not much reason to use the .40 mags.

1KPerDay said:

FWIW see 4:44

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If it’s on the internet, it must be true.

I respectfully disagree with him. If you leave the 9mm ejector in and then go back to shooting .40 or 357 sig, the slight bend in the ejector could possibly ignite the rounds, but only if you’re hand cycling the slide. The ejector doesn’t make contact with back of the case until it’s been fired, and then it’s a moot point.

Jim Watson said:

Why? I do not see the point of buying big and shooting small.

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For starters it was a gen 2, which I personally think is the best gen of all, and it was a police trade in that was $300. If you buy big you can then shoot 3 calibers on that platform. If you go with a 9mm, well then you’re stuck shooting 9mm from it.

Okay there is a difference between 40/357 magazines and 9mm magazine and they are not interchangeable.

From left to right: G19 mag -9mm, G23 mag -9mm, G19 mag - 40S&W, G23 mag -40S&W



G19 9mm with 9mm follower, G23 mag - 40S&W with 40 follower



G23 mag - 9mm with 9mm follower, G19 mag - 40S&W with 40S&W follower

wgp said:

Hey Zerodefect, I'm curious why you refer to the G35 as "the best auto pistol ever made"? Frankly I was not familiar with it even though I have 5 other Glocks. My LGS had one and I was curious so I did some research about it and liked what I read. Now eager to shoot it. I know "best ever made" is subjective opinion but tell me your reasoning.

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You can't judge Glocks until you try a G35.4. And compare it side by side with a 1911 (the old guard), shot timer, and a USPSA stage.

Light recoil. Fast cycling. Fast light swing weight. Looooong sight radius. It's the only lightweight fullsize pistol keeping up with $3000+ steel race guns out there. And it's 100% reliable. Add a Dawson Ice mag well, base pads (20+1 capacity then), and sights and it's one heck of a firearm.

I think that it's the best pistol that Glock has ever made. First time I shot one, rapid fire, I can still see the hose of 3-4 empty cases flying in the air, in the corner of my eye. In my hands, it's combat range is about double what I'm comfortable with, with my G23.

Strange, I watch the G 34-35 shooters at USPSA and they have weights on the rail, heavy mag well funnels, heavy FLGRs, and there is even a discussion on Benos about interpretation of the NROI statements on flashlights. Like whether you can have a flashlight body with lead "batteries." And consider the increase in weight limit to 59 ounces for what they laughingly call "Production."

G35s do have adjustable rear sights from the factory, which is a nice selling point. I bought a used G35.3 that came with a the original barrel and a lone Wolf conversion 9mm barrel. I've only ever shot with the 40sw barrel so far. I kinda do want to get a .357Sig barrel just to dip my toes cheaply into trying that caliper

I switched to Warren Tac, Sevigny comp sights.

All of those weights come off though. Sometimes, lighter is better. We're already seeing people hit critical mass of weight, and start dialing it back down. And new stage designs are being put together to ''challenge'' the heavy weights more. Also weight of the shooter, or at least the shooters arms, comes into play. It's the big guys returning from the heavy weight fad, mostly.

My magwell is aluminum. But I do like a heavy guide rod at least. All the time.

Jim Watson said:

Strange, I watch the G 34-35 shooters at USPSA and they have weights on the rail, heavy mag well funnels, heavy FLGRs, and there is even a discussion on Benos about interpretation of the NROI statements on flashlights. Like whether you can have a flashlight body with lead "batteries." And consider the increase in weight limit to 59 ounces for what they laughingly call "Production."

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Pretty much..
The best Glock shooter in the world ran a solid lead filled dummy light for years. *(Probably still does but I haven't kept up with anything since COVID. )

There is no replacement for weight!

my first foray into Limited was with a 35 it was meh.

I much prefer my 2011's and CZ TacSport. (Both are more reliable than the 35's to boot (yes plural))

I converted my 3 Glock 40's to 9MM

All got quality barrels and new 9MM magazines.

They all run perfectly.

Glock 27 to 26.

Glock 35 to 34

Glock 23 to 19

Nothing but barrels & magazines were changed,all run just fine.

I've got a G35.3 with a Lone Wolf 357 SIG and 9mm conversion barrels. It runs 357 with no issues from the 357 SIG barrel in the .40 slide, G35 internals and G35/.40 magazine.

It runs 9mm just as well as .40, but with the 9mm conversion barrel in the .40 slide, G35 internals and 9mm Glock/SGM/Magpul magazines. You should not have to swap out the extractor and ejector. You can slightly modify .40 mags by bending the feed ramps/lips in slightly to run 9mm in .40 mags, but I'd just get 9mm magazines.