What is rock choke?

Will Winchester 1400 barrel fit a sears mod 300? Browning 9mm model number what is the location? What is the age and value of a proof tested 12 gauge 2 3-4 inch chamber Springfield 94a shotgun manufactured by J Stevens Arms Company Chicopee Falls Mass? What is the value of baystate single shot shotgun 16ga? What is the wooden part on the fornt of a rifle called? Where can you get information on a specific German Mauser 98 30.06 rifle by serial number? What is the value of a Winchester Ranger model 140 12 gauge? What year was a p beretta-cal75-brevet-gardone vt manufactured? Tula toz 66? What is scrap galvinized pipe worth? What is value of Winchester 1873 38 cal octagonal barrel serial 464307b? What is the best magazine for an Essex Arms 1911 frame? What is the value of your 1884breitling watch? What kind of ammo does a percussion cap gun fire? What is the worth of a 1931 victory ejector 12 gauge single shot shotgun? When was the 12ga c-lect-choke model 395kb bolt action with a wooden stock manufactured? What nightclub will let you have a sweet 16 teen? Is it legal to own a German Luger probably confiscated during World War 2? What year was your cooey mod 600 ser no g005593 manufactured? What the value of a Remington 22 12c serial562582?