What is value of a h dumoulin model 270?

What is the age of a marlin 336 serial number P13539? Chuckster model 620 k 22 magnum--wmp single shot would like to know when and ware the gun was made and how many? Age of Mossberg model 83 shotgun? What is the barrel twist on a Winchester model 670 in a .243? From how far can you hear a 50 caliber rifle? What do you use pellgunoil for? How do you disassemble a smith and Wesson model 40? What year did smith and Wesson first make the 35 cal revolver? Who made the Essex 22 long rifle for belknap hardware of louisville Ky.? What is the value of High Standard MFG Corp Supermatic 22 cal long rifle serial number 396160 worth? How do you replace hammer spring in western field double barrel 20g? How do you take the cylinder out of a 357 mag revolver mod 66-1? If a 20 gauge shell is placed in a 12 gauge shotgun what is the danger? Where can you find parts for a JC Higgins shotgun? How much is a 30-30 model 33 made by westpoint cotter and company? What do you call a wood factory? What is manufactur date of your smith and Wesson with serial number 701834? Which form must be signed by the range safety officer to certify specialized ammunition items were expended? What does amt due? Is there a gun manufacturer making a 3.5 inch 20 gauge shotgun?