If you want to see something really ridiculous, youtube makes you sign in to view a video on installing a magazine extension.

https://www.youtube.com/watch?v=O8u_wEA2pyw

I can install these just fine. It's removing the extension that's the problem. I called Walther and they said to just stick a screwdriver into the rectangular slot in the locking plate at the back of the extension and push up (towards the direction of the top of the magazine) and then you should be able to push forward on the extension.

Ain't happenin'. I can push up on the locking plate and it moves, but the extension will not push off, won't budge at all. Complicating matters, it seems, is the fact that the spring tension with the 17 round version of the spring in these mags is through the roof.

I've already marred up one of these mags a bit trying to get this thing off.

Anyone have experience with this?

I think this probably needs you to push the retention plate as high up as you can to move the spring out of the way of the extension when sliding it off. It is the same way you had to remove the extended base plate off of the Para=Ordnance magazines I used to have. It might not absolutely have to be pushed that high if the rear portion of the spring is out of the way enough for the extension to clear it but if you're able to push the spring high enough into the magazine it would slide free for sure.

Edit: After watching more videos I think this one might be similar to what you have:



So my experience is not helpful at all.

Yes, that's how it's configured, and as a matter of fact, these Walther mags are Mec-Gar magazines. That locking plate in the video is exactly the same as on these Walther mags, but as I said, the spring pressure on these Walther mags is through the roof, and I cannot get this floorplate off.

Getting them on is a breeze, but, once on, forget about it.

It's not worth it to do so, but I am almost tempted to send this in to Walther service. Here ya go, fellas. Show me how easy it is. Havin' a little trouble with it are ya? Oh, surprise, huh?

I'll take a look at mine when I get home, if no one chimes in before me.

The problem is being able to lift the locking insert high enough and, as I've mentioned, the spring pressure on the mags using the aluminum extension is very high. I can't get the locking insert lifted high enough to release.

Now, the ugly polymer +2 extension which turns a 15 round PPQ magazine into a 17 round mag uses the same locking insert. I disassembled one of these mags the other day by simply using my fingernail.

That's just strange, because both the aluminum +2 extension and the polymer +2 extension use the very same locking insert and the very same 12 coil magazine spring.

Para, have you looked at this video: https://www.youtube.com/watch?v=TOxpxgJcfsg

Looks like you have to pry the metal tab out of the mag, to where it was just after you slid the baseplate on when you went to assemble it.