Abstract: The invented firearm leveler-stabilizer reduces rifle movement to improve projectile accuracy by using an adjustable elongated member connected to the bottom surface of a gun buttstock. A turnbuckle provides an adjustment means for extremely precise leveling of the firearm's barrel while a foot pad rests upon a supporting surface to increase stability during recoil, and while the front of the firearm preferably rests on a bi-pod or other support. A swivel at one end of the leveler-stabilizer connects to a buttstock mount, and a foot pad at the other end of the leveler-stabilizer rests on the ground. In between the two ends is a turnbuckle which provides a means to adjust buttstock elevation extremely accurately for targeting. This foot pad may have an optional sling attachment point. The leveler-stabilizer pivots to against the firearm for transport or storage.