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Recoilless rifle schematic, showing how the blast from behind is designed to coounter the thrust of the projectile
SPG-9 Russian Recoilless Rifle, showing the backblast behind, that counters the recoil as the projectile accelerates forward


recoil +‎ -less


recoilless (comparative more recoilless, superlative most recoilless)

  1. Lacking recoil. Generally referring to a weapon so designed as to fire a projectile without causing a powerful, destructive backward "kick" or recoil in reaction. The objective of the design is to permit a very light cannon to deliver a relatively large projectile.