What is the age and value of a 270 Remmington model 721 rifle?

What does the date code rk for Remington model 511 mean? Can guns fire and or operate after they've been submerged in water? Is the maximum effective the maximum killing range if so then what is the maximum effective range of the 7.62x39 round? What is a High Standard Mfg Corp Hamden Conn USA 22 Cal-103 with white plastic grips worth? How do you fix stuck locking lever on Davis industries DM22 derringer? What Marlin rifle is the cross reference for the Coast to Coast model 42? What is wrong if a Harrington and Richardson single shot slug gun won't eject the shell when it is cold? What is the value of a lanber arms over and under shotgun model 101? What is the value of a Hercules 38 special gas gun? Where do you find the serial number on your old smith and Wesson special? When did they stop manufacturing 22 long rifles with octagan barrels? What is a beanhole? What is the value of a marlin model 336 lever action 32 special? What is the value of a 22 all metal firearms international Washington DC worth? What is the effective distance of a 22LR caliber bullet? Are kids and guns a good thing or a bad thing? Do you need a license to buy an assault rifle? Use table of K-1 of DA Pam 710-2-1 to calculate the weight of cartridge cases turned in for four boxes of the following DODIC A071 Ctg. 5.56mm Ball M193 (1680 rounds per box)? What is the value of a Parker hale model 1200? How old is a Winchester model 94 32 ws?