the gun barrel stabilizer system of the present invention increases or optimizes the accuracy of guns including small arms and artillery . the invention consists of a device called a gun barrel stabilizer rigidly attached at the gun muzzle , and extending toward the gun breech , without further contact with the gun barrel or other gun components . the device responds to the same forces which cause recoil motion and , by virtue of its cantilever nature , resists angular deflection of the gun muzzle during firing . the stabilizer system , in an optimized state , serves to maintain the final segment of the gun barrel at the muzzle moving though a locus of parallel positions up to the time of projectile release . in the absence of angular deflection at the muzzle , gun accuracy is increased to a maximum allowed by the remaining limitations of cartridge performance and barrel bore quality . preferred embodiments provide for the combination of the device with gun sights , muzzle brakes , compensators , counterweights , bayonet lugs , and / or flash suppressors including accommodation for the added mass resulting from the combination . preferred embodiments additionally provide for various modes of attachment of the invention to gun barrels .