I'm not aware of any +2 baseplates for the PPQ SC. However, a while back I modified an aftermarket +2 baseplate for my daughters P99....I don't know why it couldn't be done for an SC as well. I also modified a factory +2 baseplate....it took more work, but looks much better....couldn't find a picture on my PC.
Here's the P99.
Yeah, I mentioned it to Mec Gar as well, but... Have a p365 and, while I prefer to carry the ppqsc, there is a lot to love about p365 (and xl) and it's irksome that Sig, HK, Beretta etc offer an in between size and Walther doesn't- or encourage a 3rd party to.I sent a note about a +2 extension to MAGGUTS. While they took it under advisement they said they are concentrating on extending single stacks now.
I'm suprised Walther hasn't decided to jump on the SC 12 round magazine to get them somewhat on par with the Sig P365. While I've only held a P365 and it fits my hand well I've seen comments by people who say their hand is just too big for a P365. A compact 12-round option like the SC may be very interesting to them.
So funny story, I did design a +2 extension and while it worked, it ended up being longer than the 15rd mag with the grip sleeve! This is because the way I design my extensions requires solid plastic to extend a ways down the bottom, so that I can thread it for screw holes.
For the flush base plates with the dimple floorplates, I've not come up with another way to mount the extension that will prevent it from sliding forward. Well, aside from cannibalizing the L shaped floorplate from a +2 mag.
I'll mull it over and see if I can figure something else out.