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Glock Mag Extension 9mm/.40/.45 GAP 2 Rounds

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Our 2plus2 magazine extensions comes with and extra power magazine spring. The 2plus2 are the only Glock +2 extensions that will not fall off. They have an "L" shaped insert that locks the +2 bottom plate in place. The 2plus2 is designed for pre-ban fully metal lined (FML) hi-capacity mags in 9mm, .40 S&W and .45 GAP.

Specifications and features:
Fits Glock 9mm, .40 or .45 GAP magazines
Adds 2 rounds
For use in pre-ban, hi-cap mags 
Total number of Reviews: 9

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1.0 5
"Just got these in and can only get +1 on the glock 22 .40SW on the 15 round mags. They come in a pack of 2 not 1. I am not installing the other one on my 2nd mag because the fit on the back of the mag looks prettty bad(not flush). Just beware..."
1.0 5
"I purchased these for my Glock 26 mags (9mm). Like the other reviewer, I was only able to insert one extra round. Very disappointing."
1.0 5
"was concerned when i read the other reviews, but i figured i'd give it a try. i have a glock17 9mm w/ 17 round magazines. so i was thinking, maybe it'll actually add 2 to this gun seeing as it's only 9mm. no dice. same experience: it adds only 1 bullet and makes the magazine stick out a good bit more. which would be forgivable if i could hit that 19 round sweet spot (near where i live there's a law about how mags with 20+ round capacity are high-cap and can't be loaded at all during transport)."
3.0 5
"I bought 2 of these kind PLUS a spring intended for this and it works good. I got a plus 2 ammo to my original 17-round G-17. Those who bought this ext w/o changing the original spring, it will only add 1 ammo not 2.SPRING makes the difference."
3.0 5
"this is Zim again. i've since pushed really really hard and gotten the 2nd additional round in. but then it's very difficult to insert the mag into the gun (have to push really hard to get it to lock into place. maybe, like RENE said, the spring is what's needed to get this to work well.also recently bought a factory glock 19 round mag and had the same experience. up to 18 rounds = fine. going for the 19th is really hard, and with 19 it locks into the receiver very tightly."
3.0 5
"I'm not sure what company makes these as I don't have one BUT I have an explanation for it only adding 1 rnd vs. 2 rnds for you 9mm guys. I have a G27 and have Pierce +1 fingergrip extensions. I've owned my Glock for years but recently bought 2 new mags. When I added the Pierce extensions to my new mags I was unable to load 10 rnds like I could in my original magazines. Once I took them completely apart I found out why. Glock changed the follower in the magazines. The new follower design jams at the bottom only allowing 1 extra 9mm rnd and NO extra .40 cal rnds. So, don't blame the extension, blame Glock's design. Maybe the aftermarket will catch up and make a +1/+2 extension that will work with Glock's new follower."
1.0 5
"Bought the two round extension for my 26, after having to make like godzilla to get the 12th round in, I was content until I later checked the gun and all 12 rounds, the spring and follower were in the bottom of my console were the gun is kept(I have a concealed permit). lot of good those 2 extra would have done me if I had needed it. The bottom just blew out, I put it back together and loaded 11 and it is fine."
5.0 5
"hey its says plus 2 for 9mm and it did just that, functions very well"
5.0 5
"I don't know why you guys are having problems with this type of extension, I personally ordered two of them. one for my 9mm mag and it added 3 rounds, and one for the .40 and it added 2 extra rounds. Now when I installed them, I could load the entire mag with bullets except for the last round that gave me a hard time. The reason is because the compression level of the spring has changed to different pressure. I fixed this problem by loading and unloading the mags constantly to make it more flexable."