The word "slamfire" is spelled as /slæmfər/ according to the International Phonetic Alphabet (IPA). The initial "s" is pronounced as /s/, followed by the /l/ sound, then the short /æ/ sound, and finally the /m/ sound. The second syllable starts with the schwa sound /ə/, followed by the /f/ sound, and ends with the /ər/ sound. This term refers to a type of firearm malfunction that occurs when a cartridge is fired as the bolt is closing, resulting in rapid firing.
Slamfire refers to an unintentional discharge of a firearm as a result of the weapon’s firing pin hitting the primer of a cartridge while the breech is not fully locked. This phenomenon, also known as an "out-of-battery discharge," occurs when the firing pin is struck with sufficient force, either due to a mechanical flaw or an error in the firearm's operation, without the breech fully closing and securing the cartridge in the chamber.
The term "slamfire" originated in the context of pump-action shotguns that have a firing pin fixed in position within the bolt. If the shooter manually cycles the action or 'slams' the fore-end of the shotgun too quickly, there is a possibility that the firing pin may unintentionally strike the primer of a chambered round. Slamfires can also occur in other firearms such as rifles, handguns, or self-loading shotguns, especially in semi-automatic designs that have a free-floating firing pin.
Slamfires are highly undesirable and pose serious risks to the shooter and those around them. If the firearm discharges when the breech is not fully locked, the pressure generated by the ignited round can cause catastrophic failure of the weapon, resulting in injuries or potentially fatal accidents. Proper firearm handling, adherence to safety protocols, and regular maintenance of the firearm are essential to mitigate the risk of slamfires and ensure safe firearm operation.
The word "slamfire" is a compound term derived from two separate words: "slam" and "fire".
"Slam" originates from the Middle English word "slamme", which meant "to strike forcefully" or "to close with a violent impact". It has its roots in the Old English word "sleme", meaning "to strike against".
"Fire", on the other hand, is derived from the Old English word "fȳr", which referred to the natural phenomenon of combustion or a destructive burning flame.
When these two words are combined, "slamfire" refers to a firing mechanism in firearms where the bolt is released and the hammer or firing pin is struck forcefully against the cartridge primer to ignite the propellant and fire the round. The term is often used in the context of automatic or semi-automatic firearms that can discharge multiple rounds rapidly without manually cocking the hammer for each shot.