What is the pural word for knife?

What is the model no for a Amadeo rossi s.a. 44 magnum Ruko of Canada made in Brazil with sn. m005596? Is uravugal thodarkadhai serial a remake serial? How many yards are Kentucky rifles accurate up to? Does anyone know the value of a colt lightning rifle 40-60-260 round barrel in fair condition? When were slingshots invented? A person who made repaired and altered guns? How much is a Stevens model 15-A worth? Do all guns have bullet shells? How old is your Winchester Model 94 32 Win Spl sn 3242513? What is the value of the interarms 22 pump long rifle model 62 sa? Is a 1887 OCT 4th Patent Harrington Richardson Revolver with the serial 8460 a collectors gun and when was this one manufactured? What is the value of a Jennings 22cal handgun? Will a marlin model 25 breech bolt fit a marlin model 20 rifle? What is mySheridan Silver Streak pump air gun worth? What is a police gun that doesn't use bullets? How old is Springfield 1884 trapdoor serial 384103? How do you make a Glock 21 full auto? How old is your Stevens westpoint model 948? What are Oxford Arms shotguns? What is the worth of Smith and wesson 357 magnum revolver model?