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Direct impingement
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{{Short description|Type of gas operation for a firearm}} [[File:DIRECTM16.gif|thumb|250px|direct impingement]] '''Direct impingement''' is a type of [[gas-operated|gas operation]] for a [[firearm]] that utilizes gas from a fired [[Cartridge (firearms)|cartridge]] to impart force on the [[Bolt (firearms)|bolt]] carrier or slide assembly to cycle the [[action (firearms)|action]]. Firearms using direct impingement are theoretically lighter, more accurate, and less expensive than firearms using cleaner and cooler gas piston systems.
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