The one best self defense weapon for almost all situations will be a compact, lightweight rifle with high capacity magazines. The one best weapon would therefore be an AR/M4 type rifle in .223/5.56 cal. Any good semiauto handgun in the 9mm, .45 or .40 cals. is good for back up. You would already be in deep trouble if it came to using your handgun.
You must be able to shoot and move with your weapon. A 6 or 7 pound AR rifle will be always be faster to aim and hit than a 12 pound M1 Garand or other older bolt action or even heavier .308 type weapon. Try to carry a heavy M1 with 200 rounds of ammo all day and then try to hold it steady to aim while standing or moving. If you are built like Tarzan or Conan then you won't have as much of a problem. Low capacity bolt action rifles are obsolete as MBRs (main battle rifles). They are fine for sniper work or civilian hunting, but are a poor choice otherwise. Handguns are for stealth or back up. Common wisdom says it's better to have 16 rounds than 6. Just look at what our police and military carry and see absence of revolvers.
This being said I would always bet on a trained combet veteran armed with an old bolt action rifle and a .38 special winning a firefight than some untrained kid with the latest and greatest firearms. Firearms training is more important than firearm selection.
You must be able to shoot and move with your weapon. A 6 or 7 pound AR rifle will be always be faster to aim and hit than a 12 pound M1 Garand or other older bolt action or even heavier .308 type weapon. Try to carry a heavy M1 with 200 rounds of ammo all day and then try to hold it steady to aim while standing or moving. If you are built like Tarzan or Conan then you won't have as much of a problem. Low capacity bolt action rifles are obsolete as MBRs (main battle rifles). They are fine for sniper work or civilian hunting, but are a poor choice otherwise. Handguns are for stealth or back up. Common wisdom says it's better to have 16 rounds than 6. Just look at what our police and military carry and see absence of revolvers.
This being said I would always bet on a trained combet veteran armed with an old bolt action rifle and a .38 special winning a firefight than some untrained kid with the latest and greatest firearms. Firearms training is more important than firearm selection.