Original sentence: A recoilless gun or recoilless rifle (RCL) is a lightweight form of weapon that allows the firing of a heavier projectile than would be impractical to fire from a recoiling weapon.Smoothbore variants (those devoid of rifling) are termed recoilless guns
Edited sentence: A recoilless gun or recoilless rifle (RCL) is a lightweight weapon that fires a heavier projectile than would be practical to fire from a recoiling weapon of comparable size.Smoothbore variants are recoilless guns