Abstract: A blade attachment adapted for use with a firearm having a recoil adjusting plate with a plate aperture and a recoil adjusting plate coupler, as part of a combined firearm and blade assembly. The firearm has a stock with a butt end having a butt end aperture. The firearm has a rear stock aperture and a rear stock coupler. The attachment has an anchoring component including a tongue having a tongue aperture, and a blade component including a collar having a collar aperture and a blade. A method for coupling the attachment to the firearm includes inserting the tongue between the plate and the butt end, aligning the tongue aperture with the plate aperture and butt end aperture, aligning the collar aperture with the rear stock aperture, and employing the plate coupler and rear stock coupler to secure the blade attachment therebetween. The blade can have variably shaped blade edges.