Shooting 9mm in your .40... just a barrel swap away!

Lenny Magill answers one of the most commonly asked Glock questions... "can I shoot 9mm in my .40 Glock?" Lenny shows why you need an actual conversion barrel; how simple it is to install; and whether your .40 magazines will feed 9mm ammo.

[@Quality_Guru]

Lenny demonstrates that he is a king among men. He could have taken this opportunity to sell us new mags, but he provided us with intel to enable us to make an informed decision. Exceptional coverage of this topic. Loved how you demonstrated the differences between the two barrels for those needing to know. I also liked how you slowly demonstrated how to take off the slide with cautionary steps. Best video on this topic - Nicely done!

[@leonardlucian4175]

i realize it is quite randomly asking but does anyone know of a good website to watch new tv shows online?

[@everettlondon1384]

@Leonard Lucian I would suggest flixzone. Just search on google for it =)

[@joemiles8402]

@Everett London Yup, been using Flixzone for since april myself =)

[@leonardlucian4175]

@Everett London thank you, signed up and it seems to work :D I really appreciate it!!

[@everettlondon1384]

@Leonard Lucian glad I could help xD

[@wstwest]

Lenny is "by far" the best teacher with Glocks. Thanks Lenny

[@wehrewulf]

It isn't rocket science.

[@89rbb]

Thank you for being honest and not saying you have to get 9mm mags for it to work just so you can sell a few more. I really appreciate it Lenny!

[@tarjas]

Thanks for the clear/concise video with relevant info- picked up a G17 mag to go with the conversion barrel incase I need an reliable 9mm set up in a SHTF situation. Already put 200 rds through my G22 9mm conversion barrel with 0 issues- actually a lot more fun (and cheaper) than .40 but still using my home defense set up (G22/TLR-2).

[@AlabamaPilgrim333]

Lenny is a natural born Salesman. I like to watch him present and talk. You can learn a lot from his body language and how he speaks.

[@catholic200747]

Yes. You can use a G31 barrel for a G22, G32 barrel for a G23, & a G33 barrel for a G27, factory or aftermarket. 40 mags work perfectly fine with 357.

[@metalwaterstudio7772]

As clear and to the point as you can get. This guy always has good answers. Thanks

[@Yumaironwood]

Finally, a straight answer. Good job, Lenny! That's why you have that parking spot with your name on it!

[@LordKaos666]

I always enjoy your videos....from the old shooting and training videos until these. Thanks Lenny! I learned too much from you.

[@Kenchinito2207]

I find it funny that youtubers like to safe inspect the gun on camera. And when they don't do it, people freak out as if they were about to be shot at... It's not like a bullet is gonna flight out of your screen.

[@advres]

It's about showing proper safety. If you act like a dipshit, people will mimic it. The more they can do to have less dumbasses shooting themselves or others accidentally, the better off we'll all be. Not sure why you think it's so funny to call out someone being unsafe with a firearm.

[@gabecartmill3487]

advres them doing it or not on camera isnt what causes it its the stupidity of the people who do it which is the cause and stupid will never go away completely so no real way to stop it you can try and teach them but it still wont get through to some

[@junespiritu3234]

Kyon, It is done to please the safety nazis trolling KZbin.

[@avrail5seven793]

And how many of them wouldn't think twice about appendix carry?

[@bartvanriel6767]

@@avrail5seven793 what makes appendix carry more dangerous than any other way of carry?

[@Ajackz411]

Lenny, your face at 4:51-4:52 compelled me to comment. Your face alone turned that into the longest single second in my life. And ive had some really slowmo action packed single seconds.

[@meangene4038]

Ajackz411 Yeah, I wonder what Glock thinks about him promoting the use of a .40 mag with 9mm rounds. They probably made the same face.

[@crossdrawjohn821]

Ive had one of these conversions for years. Love the option . G17 mag's work real well and the added rounds mean LOAD LESS.. My G23 40cal. to 9mm I love it

[@Coreycane]

Crossdraw john do you notice any difference in accuracy with the conversion barrel ? Or can you not even tell it's been converted?

[@bhales6000]

Corey Canestrelli i converted my G22 Gen2 down to 9mm I have not seen or noticed any change in accuracy

[@frankmac154]

Did you have to change out the ejector or no?

[@SkullyBeast]

Crossdraw john id like to know if you had to change the ejector. I want to do this to my G23 for only target practice.

[@SkullyBeast]

Well more so just fun shooting not practice for accuracy

[@skinnycorprus]

I want this guy to teach me everything

[@placidovasquez9927]

Same

[@justmek1923]

@@Skyfall-sv8df wtf lmao

[@frankarias4985]

I know right

[@frankarias4985]

Glock guru

[@commiesnzombies]

@@Skyfall-sv8df i know biden is in the whitehouse but don't get weird on us now

[@iggyortful]

I recently got mine and it works flawlessly even with my .40 mags. Thank you Glock Store

[@Jordan-ql6tm]

Now tht ita been awhile are you still having little to no issues? I'm about to order conversions for my 27/35.

[@ashenskywalker5537]

Good to know im gunna order a barrel

[@erichandyauto]

Just want to mention that the brass to face issue on a Glock 27 G27 Gen 2.5 with a Glock 23 G23 40-9 conversion barrel was resolved with following parts ordered and installed... (1) glsp28927 sp28927 Glock Trigger Housing (Gen 4) 40 S&W (only use the 28926 ejector) (1) Glock OEM Extractor Dep Plunger Spring SP00119/ SP33522 (1) SP01176 Glock Spring Loaded Bearing 9mm & .380 Auto for Non-LCI Extractors, Black (1) SP00098 Glock Extractor 9mm (90°) for Old Style Non-LCI Slides w/ 90° Ejection Port Also, made sure to use 9mm double stack magazines. So, yes, it works. Some have issues, some don't. And some find the right combination of parts to get it to work correctly. Good luck and happy shooting!

[@johnd4348]

Mr Magill is the living example of the American dream. An owner who has a passion for his product and loves what he does. Makes a high quality product at a reasonable price. I love all his videos. Not overbearing sales job, just the fact. You be the judge

[@cyaegha3089]

If you want full conversion and reliability to carry you need to change the ejector , extractor and spring loaded bearing. Those parts are all different in the 9mm glock 26, 19,17 etc.

[@Sourpusscandy]

Can you just use a glock 17 slide assembly and barrel on the 22 frame and vice versa?

[@Real_Josh_King]

@@Sourpusscandy You have to swap the ejector to a 9mm one when using a G17 slide assembly. Otherwise the .40 ejector can strike the primer.

[@wehrewulf]

Nope. A coversion barrel accounts for the ejector location, and the .40 extractor works fine.

[@facetiousmonkey5322]

OG Lone Wolf 40-9 conversion barrel in a Gen3 Glock22 RTF since 2014. No other mods. Zero issues

[@blackchuckstable]

Hope this guys is doing well. Clear and transparent.

[@NoName-wy4hf]

Stuff like this is why I love my Glock!!!

[@jbovenzi]

One thing the M&P 40 has over the Glock, you can use a STOCK M&P 9mm barrel to convert, no need to buy a more expensive conversion barrel. But Glocks are damn good guns.

[@JettBlast]

@@jbovenzi You can use the .357 SIG Glock stock barrel and stock .40S&W magazines the casings are the same size no problems......

[@ZachBillings]

I agree. I watch to the end of the video even when I'm not that into the product. I don't even own a .40 Glock, but he holds my attention.

[@Dcook85]

9mm in .40 mags is a "range only" situation. If you want to plink with that, fine. If you want to concealed carry it, run the proper mags.

[@nickguitarguy1]

Thank you for explaining the differences. I had some parts right and I had some parts wrong in my mind on this one. Straightened me right out Lenny. Thanks.

[@ubermench1000]

Thanks Lenny, you're a very good teacher , and a credit to all that is Glock :)

[@MichelCernev]

Thank you for sharing Lanny Magills . It' awesome and very educational video for me

[@Tony-qw6gw]

Best conversion barrel I've ever bought and real accurate can't wait to Tennessee store opens up right around the corner from me way more accurate than a stock Barrel

[@Themachinegun]

You gotta like this guy. Very clear and to the point. I'm looking on your web site right now.

[@jamieparrott5681]

I have a Lone Wolf conversion barrel and have at least one stovepipe going through a 30 round qualifying course. That is a 6,12,12 magazine load

[@socalpilot1816]

This conversion barrel makes the 40 cal glock superior to the 9mm glocks. It's like a glock 22 can double as a glock 17 But the glock 17 is handicapped to only 9mm

[@Senator-Wary]

and can also use .357 sig

[@dca1981]

The conversion barrels shoot better because the weight. So comfy.

[@DaveSmith-cp5kj]

Lenny is such a great shooter. It's a shame he doesn't have that many new releases for training videos.

[@parabelllum8733]

Have a Lone Wolf on my Glock 35 ..... works perfectly ...I use 40 mags all the time for 9mm and have had no issues over a long time .

[@scarpia519]

My experience is exactly as he mentions with double feeds using the 40 mag with the 9mm cartridge. The opening of the 40 mag is not tight enough to securely hold the 9mm round reliably. That combination does work but it is not 100% reliable. I have since acquired 9mm magazines to use with my G27 and the GS's 9mm conversion barrel. The is very little wiggle room in the Double Diamond 9mm conversion barrel's chamber. I absolutely had to plunk test every round and test fire to feel comfortable in using this gun as an EDC. Once I had all the kinks resolved, it is a terrific EDC by any measure. My dream gun is a 45ACP in the G27 size frame, as opposed to the bulkier G30 or G36. What I do, however, is to use 200 grain 10mm Speer Gold Dot bullets downloaded to mid-range which practically is a +p 45ACP in the G27 frame. Works for me.

[@nilbog6942]

You're gonna want a glock 30S then bud. Look up size dimensions/comparisons. Still has 10 round capacity I believe

[@frickenbored]

I swapped in a .357 sig barrel in my glock 23 with no problems. But when i do a 9mm conversion I'll get a glock 19 mag, extractor, and recoil spring, should work perfectly. Love that glock 23

[@huckleberry8079]

What get all that when all you need is the G19 mag and conversion barrel.

[@richardayala4356]

I just watched an old gunner on KZbin show that you can take a stock Glock 19 barrel and replace you Glock 32 stock 357 Sig barrel and shoot 9mm, on target, with zero ejector or extractor issues. He shot 30 rounds without a problem!

[@jcejac]

Great vid! Thank u for positing! Answered a lot of questions!

[@chuckvan1568]

Good information. I just purchased a Glock 22 and a threaded conversion barrel. Will be sending the slide to be milled for an RMR and then install a compensator too. Should be sweet!

[@marktelep5856]

I'm thinking the conversion barrel in 9mm might be better because it's thicker and a little heavier. It would negate the little recoil of the 9mm!

[@Fidelis1776]

Add their tungsten guide rod and this thing might be perfect.

[@vonvoyage14]

This is a great video! All the information that I need! Thanks a lot!

[@Sourpusscandy]

This has to be the most interesting Glock video ever!

[@joeyacosta1871]

That was an amazing situation. TG hanks for the demonstration.

[@trshively]

I got a glock 31 (.357 sig) and ended up get both 40cal and 9mm conversion barrels from lone wolf. And whats awsome is the .357 sig magazines can function with all three calibers. Flawlessly with the 40cal but I can't load a 17 rounds of 9mm in the magazine. The spring pressure is too great and it spits out the rounds after about 8 or 9. Although it didn't seem ol Lenny had that problem.

[@rickj275]

Not entirely true that it's just a simple barrel swap (at least in my case) I purchased the Double Diamond Premium barrel and used with my brand new never shot Glock 23 gen 3, I had to replace the ejector, when I went to the range and used the original .40 cal ejector it was stove piping practically every other round when shooting with the barrel conversion, (even when just racking it and trying to eject the rounds manually, it keeps jamming) when I called it in to the glock store, they knew right away what's causing it and told me I NEEDED to replace the ejector (Well, so much for Barrel Swap ONLY), luckily the ejector is just a $10 part and they even replaced it for me, I was fine driving 1 1/2 hours away to their store in San Diego only because I wanted to visit the store, for those planning to do the same with their G23, keep in mind that the ejection trajectory will be different once you replace the ejector to 9mm, it'll shoot more upward than just sideways, not super big deal , but had I known about the change in ejection trajectory I might not have gone the G23 route with barrel conversion, I'm glad that the every store personnel I've interacted on phone and at store were very nice, that kind of make up for my disappointment with the barrel conversion

[@vjoelp]

I own a glock 27. I purchased a glock 26 non-conversion barrel and bought some 9mm mags I use my g27 to shoot both .40 and 9mm and haven't has a single issue. The aim is right on no matter what barrel I'm using. So in my humble opinion I don't see a need for a conversion barrel

[@MrRino48th]

Mr.Lenny thank you for the knowledge 🙏🏿

[@rodneylavendar9699]

Now I Know I’m Glad You Explain it Correct Thanks 👍🏾👍🏾

[@bthomas2351]

Man I wish I would have known this before buying my first glock 9mm. Would have definitely sprung for the 40 with the conversion. Still pumped for my glock store order to come in for my g45

[@dponzi56]

I bought a conversion barrel for my Glock 23. I did use the G23 mag. It worked, but hangs up and the gun jams occasionally. I have a G19 too, and I just use the magazines for that gun. I was planning on getting the 357 sig barrel too, but I can't afford that ammo anymore.

[@matthewhartup941]

Good to know. This is not the case with my S&W M&P Shield 2.0 chambered in .40sw. I was able to drop in a factory 3.1 inch 9mm barrel for the 2.0 with no problems. The only difference between barrels is the 9mm is maybe a couple thousandths of an inch narrower top/rear part of the hood where the view port is for the loaded chamber indicator. For me it's more accurate and more fun to shoot at the range with the 9mm barrel.

[@SmokinZen]

Great video your very good at explaining everything I'm excited to go out and try my Glock 22 with this barrel. It's like having two guns in ☝️

[@Beanie-Sandals]

My brother was like you just fucked up by getting a .40 and not a 9, well little does he know I can shoot both and it didn't cost that much at all! He's stuck with his G2C Taurus lol

[@robertsherman5217]

I worked at a gun range a few years ago and took a rental Glock 22 and put in a Glock 17 rental pistols factory barrel and mag in the G22 and it was 100% reliable!! Just stating a FACT!!

[@mikequyl8754]

Good to know . The 9 mm hold well in the model 22 mags ? I can buy some but if they work just fine I’ll keep it that way thanks

[@TarmanTheChampion]

@@mikequyl8754 yup, sometimes you'll get a hiccup, but at least with mine to its VERY RARE for me. I just still wouldn't trust it 100% for self defense. You want know for a fact it will always go off & be ready in an emergency. So I definitely switch it back to the .40. I just keep the conversion barrel for SHTF ammo swapping & cheaper target shooting. Although I swear to God I shoot better with my .40 than I do with 9mm most of the time cause I've practiced with that caliber the most.

[@rajvosa71000]

I would change the recoil spring to prevent stovepipes due to the stronger .40 spring shooting weaker 9mm ammo. I have it on my 40-9 conversion and it works flawless. Just order a regular G19/G17 spring and drop it in there when you change your barrel.

[@shanek6582]

Plus a 19 and 17 are different lengths and aren't interchangeable

[@richardgonzalez8135]

You Can Use 9mm slide it just has a tiny bit of play because 9mm barrel is thinner by .02 roughly so you may lose a little accuracy but will work fine especially for basic plinking

[@1Sigmeister]

FYI Glock Gen 5 guns are not interchangeable with other generation Glocks. So a G22 conversion barrel Gen 1-4 will not work in a Gen 5 G22. As of this date, Barsto is the only 9mm conversion barrel made ($240)for the G22 GEN 5. I found out the hard way.

[@marsoelflaco5722]

Glock 17 mags, along with this conversion barrel and you're in business to shoot 9mm safely and reliably through a Glock 22.👌🏽👍🏽

[@twoblink]

Ironically; the conversion barrel is a lot thicker; so it's almost like a bull barrel. I'm going to get one!

[@arthursmith643]

Albert Yang you can also shoot 357 sig ammo with a 357 sig conversion barrel from your Glock 22. Using your 40 cal mags. ”40 and 357 sig are exactly rhe same.

[@MonstaFreak13]

@@arthursmith643 actually the 357 isnt a conversion barrel, its a stock 357 barrel just make sure its from a gun the same size frame

[@j.r.777]

My every day conceal and carry is a Glock 45 MOS. I like the 9x19 Luger caliber but also love .40 S&W and .357 Sig. if I could easily convert a G45, to accept .40 S&W and/or .357 Sig, I would buy 2 more G45’s immediately. If someone had a .40 S&W G23 slide and barrel and a .357 Sig G32 slide and barrel, I wonder if it could be done then? I would even buy the proper caliber Glock magazines if I needed to as well.

[@outerspaceman7534]

Sweet I was shooting in this same exact room as Lenny. Very awesome room.

[@BusyBee11226]

Lenny, you are the man.

[@hughhefner7569]

That was fukn awesome lol Lenny good looking out bro very good easy to understand conversion process.Glock is killin it

[@TurfSurf]

40cal mag will work perfectly in the third-gen G22, but don't know about the newer gens.

[@ARIES5342]

This is a game changer. Adam

[@mrapple3702]

You could also take that G23 and pick up a G32 barrel and then you could shoot .357Sig as well.

[@anthonywebb2170]

The extractor is at a different angle in the 40cal gun. Maybe the mag doesn’t align properly since its made to align with a 9mm gun. But its cool that it still shoots if you need to use those mags.

[@chrismcginnis6532]

I'd swap 40 to 357 sig vs 9mm...yeah I know not a popular idea...but I like the 357sig

[@stevek343]

Me toooo.

[@jayanthony2342]

Thank you very much. Amazing info.

[@Nikonik66]

Not to take away from how great your videos are but I have to admit you remind me so much of Mike Roe from dirty jobs.

[@solomonarmstrong7845]

G22 and G17 can swap just have to change magazines also G23 and G19 it’ll be fine all u have to do is change uppers and magazines

[@rickclark4714]

My older 40 mags are too stretched out to function well with 9mm. But with newer mags, at least for the range, the 40 mags will work with 9mm. For defense tho, get a factory 9mm mag, or just stick with 40…even better.

[@Renaldo135]

I have an aftermarket conversion G27 storm lake barrel in 9mm for my G27. I have never bought a G26 mag and have shot many many 9mm rounds using the 40 caliber magazines and never had an issue plus you get an extra round. So with the pearce extended G27 magazine it makes the 9mm a 12 shot. I got it for the range because 9mm is cheaper and more pleasant to shoot and if it doesn't work on the range so what, that is the best time to have a malfunction. For protection I put the 40 barrel back in anyway.

[@droyal1975]

Thanks for a great video. Recently purchased a conversion barrel and was curious as well. Just subscribed.

[@ridingwiththereids]

Good to know. I was given a 9mm conversation Barrell for my Glock 22 .40 and was curious if I had to buy new magazines. Good to know I can shoot off some 9mm ammo that I had laying around for basically free 👍

[@garylee9738]

I love his voice.

[@jbovenzi]

Great video, sent it to my son who just bought a G33 in .357 sig.

[@Nikonik66]

My Glock sales rep says 9mm cartridges in a .40 cal mag will spring out the top like a popcorn popper because the mag spring is too strong and the feed lips are too far apart. I told him you disagree so I sent him the link to this video.

[@mickt6987]

Great video, wish I would have seen it before i traded my 22 for a 17

[@harvylmarquez2816]

he said yes but the company says no just remember always shoot safe and point ur weapon in a safe direction

[@Senator-Wary]

Thanks buddy a family friend is selling his .40 so I might just pick this up as well

[@TheEdterrazas]

I have your conversion barrel in a Glock 32 (357sig) and have tried using my 357/40 cal magazines but found them unreliable. As you indicate, it works but some times the rounds come out and fail to feed. I won't recommend using other than 9mm mags in a carry or home defense gun.

[@ericgagnon2913]

Lenny Magill, would you have any issues converting from .40 to 9mm with just the drop in barrel and 9mm mags for every day carry?

[@alejandrosastre2232]

Damn!!! you're a Great Shooter man!

[@garycarr9112]

love how they don't give any kind of shout out or mention to lone wolf products

[@jsmcguireIII]

true but everyone knows LWP so no problem.

[@danamcwhite]

Gary Carr his in the business of making money not moving customers away like other youtubers giving shout outs. Lenny is an old school business man. You know it works because he has an actual store front in San Diego that’s big has fuck. So he must be doing something right

[@ryangreen6250]

Why would he give shout out to lone wolf all i hear is negative feedback toward them. Ive tried 2 or three products a connector and spring combo and slide stop, i returned all items. Haven’t seen one product that people have not had problems with

[@travis65b]

Exactly, buy it straight from lone wolf.

[@angelogotrice]

I was wondering about both of these things thanks for addressing and providing proof

[@sinqros]

I bought a G19 there in 2012.. great store..

[@bigrod0069]

good to know. thanks

[@blueplasma5589]

It would of been nice if you showed the actual differences on the hood of the two barrels.😁 "but you can take it down" (by using the specal conversion barrel, eah.)

[@Pressplay267]

I've actually stuck my factory g17 berral in my g22 slide and it fits perfectly but it does rattle a little because the berral is skinnier but still fires but not as accurate

[@AshGreen359]

There is no reason to buy a 9mm when with a .40 you have more options. Don't forget your can also get a .357 Sig barrel for many .40 as well. You need a special barrel for the Glock? My Beretta 96 can simply take a Beretta 92 barrel and works fine. Using the .40 magazine is a little awkward but I've never had a malfunction.

[@travisthornsberry1043]

As I understand it, you also need to replace the trigger block. Each extractor is different for each caliber.

[@nathansharples3898]

Lenny long time no watch hope everything is well with your family and such just purchased a Glock 22 Police Trade in Luv it I don’t know why I didn’t buy A 40 caliber before this it’s really just what I was looking for a higher velocity more of a man stoping round but not all of the recoil that comes along with some of the larger calibers I still like 357 there’s nothing wrong with 357 but it’s expensive

[@ed6631]

Great educational video

[@darkblue9863]

Conversion barrels are fine. Almost a thousand rounds in the one I have. Just spend the money for the G17 magazines.

[@pumpkin12162]

The 9 mm ammo is cheaper and "at least was" more widely available. Also some people find the kick of the 40 too much after a day of shooting. The .40 ammo wouldn't feed in the 9mm barrel because it wouldn't fit in the smaller hole.

[@Tom-qx5nl]

If the potential is there for a double feed because of wider feed lips, I'd buy 9mm magazines, my life is worth it. Thanks for the video!

[@removechan10298]

GREAT VIDEO!

[@qubexdatarecovery]

So i finally decided to give it a try, though my gun lov'in buddies told me not to. I got brand new Lonewolf LWD-239N barrel and went to the shooting range this passed weekend. NOT HAPPY AT ALL. Damn thing jamms 2-3 times on one x15 round mag. after a 3 or 4 mags, it jammed to a point that i was not able to extract empty shell from the barrel nor i could not remove barrel because shell got stuck in it. I used various rounds Tuls,Remingtons,Winchester, Federal. None of these rounds jammed in beretta px4 or HK VP9, only in my glock 23 with this Lonewolf barrell. This glock has about 300 rounds through of its original caliber and never jammed, so i assume its the barrell. Wish i could attach photo.

[@qubexdatarecovery]

Seeing some people replacing ejector also... i didnt do that, as i saw quite a few guys shooting it just fine without replacing ejector. Changing that, does not make any sense to me, as was thinking about having 2 different cals that i can hand swap in the field quickly without any additional work.

[@dinuguan510]

If I had any interest in 9mm, I'd go with a lighter spring (15-16 lb), a 9mm ejector, and 9mm mag. Who wants a Glock that "mostly works"? I read somewhere that the Lone Wolf 40 to 9 conversion barrel supposedly compensates for the different shell diameter, such that changing the ejector is not required, but I don't see how that's possible. I haven't personally done it, but I don't see how the barrel's chamber has anything to do with the alignment of the extractor to ejector, so I'd be more inclined to swap the ejector too.

[@MrPatsDad]

The recoil spring is the same part # for generations 1-3 for both calibers, it's different in the generation 4s though. Some pistols will function fine without changing the ejector, but some won't. It was hit ot miss with my gen 3 23, so I changed out the trigger housing with one that had the 9mm ejector and it's been just as reliable as my 19.

[@jcnieves2992]

Thank you

[@ryangreen6250]

My friend said The double diamond 9mm did not work proper on polymer 80 . Maybe just a out of spec barrell I don’t know but the gold finish was not impressive to say it politely