I've been researching a small, short, lightweight carbine for my long gun. I want something that is easy to carry but have enough to get me out of a pinch. I am mainly going for my long gun in a shtf situation. I was all set to buy the Ruger GSR, but dont like the $800 tag. Im shooting for $600 or less. I have looked at marlin guide gun and s&w m&p15 sport, and marlin 336y. I want ghostring sights and 16-18" barrel. Give me some more ideas. Im looking for a defensive weapon to get me outta trouble when i need it. Thanks for ideas. It will be paired up with an xd9.