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...eased, the firing pin strikes a primer located in the side of the casing's rim. Additionally, as the shell casing absorbs the majority of the firing stre *[http://world.guns.ru/grenade/gl11-e.htm AT4 Information Page - Modern Firearms]

...at an extremely excessive pressure. This causes the extractor to tear the rim off the cartridge case exposing the action to the dumping of very high pres *[http://world.guns.ru/rifle/rfl17-e.htm Modern Firearms article]

...re, 90 mm case length, [[Rim_(firearms)#Rebated_rim|rebated]]/reduced rim. Unlike most other weapon rounds, which used traditional brass for the case ...th a rebated rim were used, so that the extractor claw could hook over the rim and still fit within the chamber. Primer ignition was timed so that the bol

...rim]] allows the face of the bolt, with its extractor claw hooked over the rim, to fit within the chamber. To ease the motion of the case, the ammunition