I would still either vouch for a more proven platform, like the AR-15 design and the easy to find .223/5.56. I'm not so sure about the firearm you brought up, as I've never heard of it until today and much less never fired one but as far as I know it could very well be a viable choice *shrug* it probably just comes down to preference though. I prefer the Beretta 92FS to the Glock or the Sig Sauer models because I'm far more accurate with it than the latter two. Sigs are to touchy (to me) and the Glock feels. . . 'cheap'.
Really, I'd prefer to keep a semi-auto shotgun compared to the handgun or AR-15 (I've never liked the M16 much). 12 Gauge shells are probably just as common as 9mm and bird shot shells are easily jury rigged into slug shells; I've done this before, but wouldn't recommend doing it all the time though ohohoho!
lol just us two talking about the apocalypse ohoho!