Animation showing the cycle of a lever-delayed blowback action.
Lever-delayed blowback operation uses a lever to delay the opening of the bolt. When firing, the round pushes the bolt backwards moving a lever that pushes the bolt carrier faster than the bolt during the first stage of extraction.
Development[]
John Pedersen patented the first known design for a lever-delay system. The operation was later adapted by Hungarian arms designer Pál Király (a.k.a. Paul de Kiraly) in the 1930s and first used in the Danuvia 43M submachine gun.
Examples[]
Weapons using this operation are the TKB-517/2B-A-40 assault rifles, the AVB-7.62 battle rifle, the San Cristobal Carbine, the FAMAS, the FNAB-43 submachine gun, the Hogue Avenger and Benelli B76 pistols, the Sterling 7.62 and AA-52 machine guns.
Gallery[]
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