Abstract: Firearms and bolt carriers having a bolt head including a bolt head axis and a plurality of locking lugs, wherein at least two recesses having a radius, measured with respect to the bolt head axis, are formed on the bolt head between at least two adjacent locking lugs. To improve the guidance of the bolt head, at least two centering ramps, which are designed obliquely to the bolt head axis and protrude in the axial direction toward the rear up to a central radius that is greater than the radius, for self-centering the bolt head during the bolt process are formed in the region of the recesses.