Actually, I have that exact setup - holster grip, barrel length, everything. Freaky!

I was seriously considering, just for fun, designing sort of a military style PSK tin with one of those included (without the holster grip to save room) for the primary purpose of taking small game at close range. Around here, I've seen squirrels and birds that were very close, but just out of reach - 10 meters away or less. However, it does lack any sort of real sights, and I haven't gotten a chance to go to the range and see if it can hit targets reasonably often at that range yet...