If you're interested in fitting out an M-6 combination gun, take a look at the following web site:
www.savage24.com
Click on the M-6 links.
Personally, I much prefer the Savage 24 in 20 gauge. With a 22 WMR upper barrel and a careful selection of ammunition, you're equipped for just about any reasonable type of game. The 24C "Campers" model, altho 22 LR/20 ga, has the advantage of stock ammo storage and 20 inch barrels.

'There is nothing so frightening as ignorance in action"

Actually, I'm planning on using an AR-7, with a shotgun shell holder with a flap on it to carry a SAK and some tubes of supplies. I'll be using a sling that will be laced on the barrel when needed, rather like the leather handgaurd on the supressed Sten from WWII, which will have a couple of small pouches attached to it.

The joy of this is that it can be very easily adapted to any rifle or shotgun.