New Haven 600 is a series of shotgun

Shotgun

A shotgun is a firearm that is usually designed to be fired from the shoulder, which uses the energy of a fixed shell to fire a number of small spherical pellets called shot, or a solid projectile called a slug...

s manufactured by O.F. Mossberg & Sons

O.F. Mossberg & Sons

O.F. Mossberg & Sons is an American firearms manufacturer, specializing in shotguns, rifles, scopes and firearm accessories. From the 1940s through the 1960s, it also produced a line of .22 caliber target and sporting rifles....

 on behalf of department stores, most notably the Montgomery Ward

Montgomery Ward

Montgomery Ward is an online retailer that carries the same name as the former American department store chain, founded as the world's #1 mail order business in 1872 by Aaron Montgomery Ward, and which went out of business in 2001...

 Company, Western Auto

Western Auto

Western Auto Supply Company was a specialty retail chain of stores that supplied automobile parts and accessories. It operated approximately 1200 stores across the United States. It was started in 1909 in Kansas City, Missouri, by George Pepperdine, who later founded Pepperdine University...

, and other retail stores. New Haven is one of O.F. Mossberg & Sons' private, promotional brands. The New Haven 600 is identical to the Mossberg 500

Mossberg 500

Mossberg 500 is a series of shotguns manufactured by O.F. Mossberg & Sons. The 500 series comprises widely varying models of hammerless, pump action repeaters, all of which share the same basic receiver and action, but differ in bore size, barrel length, choke options, magazine capacity, and...

 from O.F. Mossberg & Sons, with the addition of an anti-rattle system in the magazine tube. The 600 series comprises widely varying models of hammerless, pump action

Pump action shotgun

Pump-action shotguns, also called 'slide action repeating shotguns' or 'slide action shotguns' are a class of shotguns that are distinguished in the way in which spent shells are extracted and fresh ones are chambered. The weapon has a single barrel above a tube magazine into which shells are...

 repeaters, all of which share the same basic receiver and action, but differ in bore

Caliber

In guns including firearms, caliber or calibre is the approximate internal diameter of the barrel in relation to the diameter of the projectile used in it....

 size, barrel length, choke options, magazine capacity, and "furniture" (stock

Stock (firearm)

A stock, also known as a buttstock or shoulder stock, is a part of a rifle or other firearm, to which the barrel and firing mechanism are attached, that is held against one's shoulder when firing the gun. Stocks are also found on crossbows though a crossbow stock is more properly referred to as a...

 and forearm

Forearm (firearm component)

In firearms, the forearm is a section of the weapon between the receiver and the muzzle. It is used to hold the firearm steady and is usually made out of wood or composite material...

) materials.