Half barrel is not a type of firearm action.
Bolt action, break action, pump, lever, semi-auto (autoloading) rolling block, twist action, That is 7 types, but there are actually more types that are rather obscure. A twist action example is the Garcia Bronco .22 rifle.
You don't have anything following, but an example would be the typical double barreled shotgun.
Design of the firearm
There are multiple types of firearm actions- lever action, bolt action, straight pull bolt action, break action, semi auto, twist break, pump are some. However, you may be thinking of rimfire and centerfire cartridges. They have different primers- in in the rim of the cartridge, the other at the rear center.
Two basic styles of firearm actions are single action and double action.
Type of firearm action
Depending on the condition of the firearm, it can be worth up to $5000 to collectors.
I have no idea of what it is?Please describe the Winchester firearm with this serial number.Is it a rifle,shotgun?Is it a lever action,pump action,semi-auto,or bolt action?What caliber is it?what gauge is it(if a shotgun)?describe the barrel length.All this is required to get a answer to your question.
The action spring is typically housed within the stock or buffer tube of a firearm. It provides the necessary tension to cycle the firearm's action and chamber a new round.
what is dubel pump action
Depends entirely on the firearm. With repeating arms, it will be operation of the action. That can be cycling the bolt, lever, pump or operating handle. With a single shot it is placing a cartridge by hand in the chamber.