AGP Arms Springfield XD9/40 and XD MOD.2 +4 Magazine Extension

I bought three extensions and added them on to one XD9 and two XD40SC magazines. In the .40 however, it will only accept three extra rounds. Nevertheless, I now have a backup 15 round magazine that I can carry in my pocket for my EDC. I have heard people talk about not using extensions because the plate will pop off the bottom, but AGP is correct when they say this will not happen with their extension. It is on solid (that also means that if you want to take it off, it's a hassle, as I found out, but not impossible. I consider this a positive, however, because it means I can trust the extension to stay on). One negative about this extension: if you want to use it with the XDSC 12 round mag and the extension (the part that just fits around the mag), you have to trim off the top part of the plastic on the lip of the AGP extension in order to get it to fit. That's not difficult however, as it just takes dragging knife or sandpaper across it a few times. All in all, a very easy, quick, and cheap way to get a three/four extra rounds loaded up.

I've only run 100rds through my mag with the extension, but not a single problem so far. I'll be using this mag at a 3-gun match later this month and if it continues to perform well I'll DEFINITELY be ordering a couple more. Thanks for a GOOD product. (after I abuse it a little I'll find out if it's a GREAT product)

I bought 5 of these and had zero trouble installing them. The included instructions are more than antiquate. I was also able to load the +4 rounds by hand without the need for a loader. As an added benefit, for folks like myself who have large hands, the extension increased the area for the palm of my off hand. I have nothing bad to say about these extensions. I've put 100 rounds through them already with zero loading issues.

Easy to install. Fast delivery.

Installations wasn't quite as easy as some here. After installing, there was interferance and I had to uninstall, sand down the top edge and re-install. Now it works great and I am extatic to have 3 more rounds in my clip. Capacity is the one downer on the XDs.

The installation was a breeze and functioned exactly as expected. I had read great reviews about the AGP mag extensions on the forums and decided it was time to upgrade all of my mags!

great product. only took seconds to install. only +3 in xd.40