I hear what you're saying Gimli, and I agree with you in that I think we should be smart about what we push for, but I think that circumventing the mag capacity limits is a great way forward. The reason I think so is that the government wouldn't have to change any laws to make it happen; the framework exists already. However, if we wanted to get the AR15 de-restricted, the federal government would have to change some legislation for sure, and I don't see that happening anytime soon. I could see them killing the long gun registry if they got a majority, but I wouldn't hold my breath regarding anything else, at least for now.
As far as I know, there was no media backlash over the 10 round AR mags, or the short barrelled 870s from Dlask. That's all old news now. There's no groups of liberals hanging around at the range to notice that you are changing mags less frequently. Personaly, I think that the 5-round limit is one of the worst rules we have, and we should continue to pick away at it. 10 or 20 round mags for M305's would be great for a next step. I've heard a lot of great ideas in threads like this, and I'm optimistic we will continue to make progress.