What does unc mean on the Remington 12 ga umc j76226?

How do you fix pump on an 860 daisy BB gun rifle? How do you identify a foreign gun? What is the value of a Winchester model fifty with two barrels? What is the value of a Sentinel 22 Pistol Model R-101? What is the value of a Colt AR 15 SP1 serial? What is the value of an Iver Johnson Model 50A Sidewinder? Where can you find info and parts for a high standard sentinel deluxe 22 cal revolver? Where is Montgomery ward located? What is the value of a 1951 browning a-5 20 gage light with a recoil barrel in perfect condition? How much is a 1949 browning 12 gauge semi automatic belgium worth? Where can you find info on marlin model 995? What year was Savage model 1904 22 caliber rifle serial number 161184 made? What is the value of a Western Field .22 Long Rifle Model M864? Can you shoot a 223 bullet in a 222 gun? Value of a Winchester 1400 12 ga SHOT GUN? What is an El Gamo air rifle worth serial number C80893? What is the value of a double barrel rabbit ear Riverside Arms barrel dated 1903? What is the value of a Browning BBR 243 like new condition 20 years old? Can you register a gun in your name if purchased by someone else? What is the value of a Remington Wingmaster 20 gauge model 870 serial number 1165352X?