Well a running project I have is of a small lightweight backpack gun using a shortened Survivor forearm and regular Survivor Buttstock...sill throwing up the idea of another Tamer stock.
I am building a nice 2 barrelled combo. One rifle barrel,one shotgun barrel.
I am leaning towards a shortened 357., 44mag, or 30-30 barrel shortend down to 17" with a very small lightweight varible scope, 2x perhaps.
Shotgun barrel.. I am still in the air a little between 20ga and 12ga.
12ga you have the advantage of much more availible ammo choices(around where I live) but with some STOUT recoil in a very lightweight gun.....
To a 20ga...humm can't say a lot wrong with that
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Either way I would want the barrel short as well (20 or 22") with perhaps a RedDot mounted.
So thats what I have been playing around with for awhile. A do it all 2some.
-Aaron