Now for one of Mr. London's wacky ideas.

[London]

Just had an interesting thought- I know I'm not the only person who's wanted a Glock 30 rd. mag for the .40. Unfortunately they only make them in 9mm and the aftermarket ones have very bad reviews.

So... here's my crazy idea. Let's say I take a 30 rd 9mm Glock mag, pop that baby open, and swap out the 9mm follower for a .40. I've read the 9mm mags have the same dimensions as the .40- never measured it to make sure, though. Some people claim to use .40 mags for 9mm and vice-versa without even changing the follower. I doubt it will hold 30; probably more like 26.

Think it'll work? Not work? Create a thermo-nuclear detonation in my hand and inspire the world's coolest eulogy? I'm no gunsmith, I'm just a crazy guy willing to try unless someone here can talk me out of it.

 

[Dawico]

The feed lips aren't right, they are too tight. The 9s do work in a 40 mag, but not vice versa. Load one round of 40 in a 9mm mag, and you will see what I mean.

 

[Stumpy]

Create a thermo-nuclear detonation in my hand and inspire the world's coolest eulogy?

thats how i want to go.

 

[London]

The feed lips aren't right, they are too tight. The 9s do work in a 40 mag, but not vice versa. Load one round of 40 in a 9mm mag, and you will see what I mean.

So here's my next question- do you think a skilled, bad-ass dremel wieldin' fool could modify the feed lips of a 9mm mag to match a .40? I'll go get one from my buddy and bust out the calipers if I have to!

 

[Charlie]

I think you can buy feed lip "adjusters" somewhere. That may be all you need. I did read somewhere a couple of months ago that there was a Glock .40 cal. made that had 20+ rds. (supposedly made my Glock). I'll do a little research.

 

[Charlie]

Found what I'd seen from Lone Wolf Distributors.

Glock G/22 Magazine 22 Rounds Item: GLO-MF22222 Back Ordered
Expected Delivery Date: 3/4/2011
Manufacturer: Glock Inc. Glock O.E.M. 22 round G22 magazine.
More... $38.95

 

[lalonguecarabine]

I think you're about to divide by zero, man.

 

[Dawico]

So here's my next question- do you think a skilled, bad-ass dremel wieldin' fool could modify the feed lips of a 9mm mag to match a .40? I'll go get one from my buddy and bust out the calipers if I have to!

You can sure try. I believe a man with a grinder, welder, JB Weld, bailing wire, and duct tape can get anything to work right.

I just tried a 40 in an extended Glock factory mag, and it doesn't work. The feed lips will have to be opened up a little. The lips hold the round straight, and it hits the bottom of the feed ramp, and stops. Opening up the lips would allow the front of the round to move up as it moves forward, and it may feed correctly then. You may be able to just bend the lips open a little at the front.

 

[London]

Thank you, Charlie. That might just be my backup plan if I can't get this crazy concept to work.

 

[London]

I believe a man with a grinder, welder, JB Weld, bailing wire, and duct tape can get anything to work right.

You forgot super-glue, my friend. Your truths are simple yet profound.

 

[Outbreak]

I doubt it will hold 30; probably more like 26.

If you can modify the lips like others have mentioned, you won't get that many in there. More like 20 would be my guess. That's based on my use of Sig P226 15rd .40 mags which, unmodified will hold and feed 20rds of 9mm in a Sig P228. Ratio in that gun is 3-.40: 4-9mm. Glocks might stack differently.