rifle,tho. Scope has some use, both for foraging and sniping, but mostly belongs in a hard belt case, for use as a substitute for binocs, because you should AVOID being in the open, in daylight. I favor used Leupolds, at no more than 25%of retail cost, usually found at gunshows and stripped off of a rifle there. The 2x7 Compact is the choice for the shtf CAR-15. Normally, when on the rifle, it's left on 2x, for the wide field of view and speed of hitting. I favor a simple Duplex x hair, with its potential for use as a rangefinder. If such a simple "ranging" method doesn't suffice, it's a shot you probably shouldn't be taking, as a civilian survivalist, with ANY rifle,much less an 11" CAR-15 223.