What Glocks will these mags work with? Saw ad that said Glock 17, 19, 26, 34. But I thought that some of these pistols had 1 stack mags and the others had 2 stack mags so the large mags would only work with pistols that accept 2 stack mags. Oram I mistaken?

They work on all Glock 9mm Models except for the new Model 43.

Th will also work on all .40 cal double stack Models if you have a 9mm conversion barrel.

chlinstructor is right; the 33 rounder will work in any Glock 9mm except the G43.

I believe the reason for confusion is that the 10-round magazines required in some states for the Glock 19, 26, 17, and 34 is actually a single stack magazine that has thick enough sidewalls to fit a double stack magazine well.

Any 9mm Glock that takes double stagger magazines.

I've got six or seven of them. They work flawlessly.

They also work in certain carbines designed for them. For example, I have a Kel-Tec Sub-2000 that takes them. Perfect function

Just make sure they are genuine Glock. I have seen other plastic glock mags, I think Korean, that were total crap. I have found the 33 round (27 round in .40) are just as reliable as any other factory mag.

Yep, South Korea is currently exporting clones to the US, and Scherer is making clones in the US. I stick with the real Glock 33 rounders.

Is magpul making them now?

Supposedly going to make 21 and 27 round mags.

ETS makes 22 and 33 round Glock 9mm mags that are transparent. I bought a couple, they are pretty durable. Had a bad spring in one of them (early run); ETS's customer service is first rate!

I haven't seen 33's by Magpul, but they do have a 17 rounder that works perfect in my 26. There were issues with them right after they came out and Magpul apparently recalled them until they fixed the problem. Mine never had any problems,though.