recoilless

无后坐力的；尤指武器发射时无强大后坐力,使轻型火炮可发射较大射弹。

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.