Who made fie derringers?

Who made the Sears Ted Williams model 75 20Ga semi auto shotgun? BrowningBAR 270 serial 137pr10002 When was it made and how much is it worth? Is gold stamped AK 14kt real gold? When was the stg 44 first made? How do you know the model and year make of a Smith and Wesson Revolver? How old do you have to be to own a tranquilizer gun? Is unique serial 119126568 real? Can BB guns fire airsoft pellets? How do i check the serial number of a shotgun? When was the last Stevens model 311 series h double barrel 12 gauge shotgun made? How do you strip a Smith and Wesson 39-2? What is the value of a Westernfield M550AD pump shotgun? What is the value of a colt 45 pearl handle powder load pistol excellent condition? What year was a Winchester 94-30 WCF sn1439912? What is the value of a Revelation rifle model 330A 410Ga 3inch by Western Auto Supply worth? What is the value of a Smith and Wesson 357 magnum model 13-2 nickel plated purchased in 1980? Were can you buy an ammunition catch spring for a mossberg palimino model 402? When was Harrington and Richardson 22 bolt action rifle serial number 43969 made? What country made the p90 sub machine gun? What is the age and value of a springfield model 511 Savage Arms 12ga?