By an SBR,I mean a title II weapon with a shoulder stock and a barrel shorter than 16".a Short Barreled Rifle. I'm not going to go into the makes and models etc,I think that might be forbidden still yet since my last visit,rather I'll be going into the concept itself,that being of reduced weight and length while providing rifle-like power for defense or hunting.examples of the SBR are: The Krinkov AK in 5.45 or 7,62. The M-4 and it's 14" or 10" tube. The ORIGINAL scout rifle as described by Jeff Cooper. The ORIGINAL USAF survival rifles. The Marlin "Trapper" with it's 13 inch tube. You get the idea,notice I didn't mention pistol calibered Macho guns like Uzis and Mac 10s.they are pistol calibered and pretty useless as hunting weapons or defending against large and angry predators. Here is a general concept of the weapon: Capable of hunting AND defense. RIFLE calibered. Shorter than carbine length barrel. Folding or collapsible stock. Capable of using iron sights or scope. Light weight but with manageable recoil. now bear in mind,I would NEVER condone using one of these as a main survival weapon! :ignore: The concept here is to save weight and room an a BOB so you can store more stuff you need like food,water,or med-kits while still having something to make a hungry bear or mutant-biker-zombies go elsewhere for dinner! A SBR can be had by paying a 200$ transfer fee to the BATFE and registering the weapon with them,then having a competent gunsmith install a short barrel or cut yours down and re crowning it or purchasing one outright from a title II dealer.Krinkovs,Shorty AR uppers and short survival rifles are out there and legal to own with the right paperwork.once legally obtained,remember the KISS rule: Keep It Simple Stupid. Once you start adding scopes,tactical flash lights,extended flash hiders,extended magazines and all this other gun-shop commando crap,you have defeated the entire purpose of the SBR!you just added back all the weight you saved,probably made it longer too,so keep your magazines to 20 rounds and under[might have a 40 rounder in your hip pocket if things get nasty!]and keep the weapon SIMPLE! In return you'll get a light weight,maneuverable,handy,powerful weapon with more firepower than a pistol and not much more weight.the only down side is accuracy,whatever the weapon's range was before,reel it back on average of 100-150 yards. REMEMBER: This is NOT a match weapon,nor is it strictly a hunting or fighting weapon,its a bit of everything.a jack of all trades,master of none.its entire concept is to get you back home or to your retreat alive so you can have access to your "specialty"weapons.