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2. Dry fire - Wikipedia

   en.wikipedia.org/wiki/Dry_fire

   Dry firing firearms is the practice of discharging (or simulating the discharge of) a firearm without any live ammunition, or practicing with an inert laser/infrared training platform such as an iMarksman or SIRT (Shot Indicating Resetting Trigger) training pistol, and may also include the use of a target/feedback system, such as the iDryfire or LASR software.

3. Double-barreled shotgun - Wikipedia

   en.wikipedia.org/wiki/Double-barreled_shotgun

   A view of the break-action of a typical over-and-under (O/U) double-barreled shotgun, with action open and the ejectors visible Two .410 shells being loaded into a side-by-side, double-barrel shotgun A double-barreled shotgun , also known as a double shotgun , is a break-action shotgun with two parallel barrels , allowing two single shots that ...

4. Extractor (firearms) - Wikipedia

   en.wikipedia.org/wiki/Extractor_(firearms)

   In modern dropping block, break-action (e.g. double-barrel shotguns) and revolver firearms, the extractor is a protrusible piece with flanges on the barrel/cylinder side, which pushes rearwards on the casing's rim and slides it out of the chambers. Some such extractors can push hard and far enough that they completely clear the cases out of the ...

5. Sear (firearm) - Wikipedia

   en.wikipedia.org/wiki/Sear_(firearm)

   Sear shown in a revolver action. In a firearm, the sear is the part of the trigger mechanism that holds the hammer, striker, or bolt back until the correct amount of pressure has been applied to the trigger, at which point the hammer, striker, or bolt is released to discharge the weapon.

6. Trigger (firearms) - Wikipedia

   en.wikipedia.org/wiki/Trigger_(firearms)

   Firearms use triggers to initiate the firing of a cartridge seated within the gun barrel chamber.This is accomplished by actuating a striking device through a combination of mainspring (which stores elastic energy), a trap mechanism that can hold the spring under tension, an intermediate mechanism to transmit the kinetic energy from the spring releasing, and a firing pin to eventually strike ...

7. Glossary of firearms terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_firearms_terms

   For double-barreled guns that use one shotgun barrel and one rifle barrel, see combination gun. Double action revolver: A revolver whose trigger performs two actions, firing the round, and cocking the hammer. Double rifle: A rifle that has two barrels, usually of the same caliber. Like shotguns, they are configured either in over-and-under or ...

8. Physics of firearms - Wikipedia

   en.wikipedia.org/wiki/Physics_of_firearms

   According to Newtonian mechanics, if the gun and shooter are at rest initially, the force on the bullet will be equal to that on the gun-shooter. This is due to Newton's third law of motion (For every action, there is an equal and opposite reaction). Consider a system where the gun and shooter have a combined mass m g and the bullet has a mass m b.

9. Crossbow - Wikipedia

   en.wikipedia.org/wiki/Crossbow

   21st-century hunting compound crossbow. A crossbow is a ranged weapon using an elastic launching device consisting of a bow-like assembly called a prod, mounted horizontally on a main frame called a tiller, which is hand-held in a similar fashion to the stock of a long gun. Crossbows shoot arrow-like projectiles called bolts or quarrels.