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United States of America As Represented by the Secretary of the Air Force

Ronald C Foster

David Paul Schenker

Patrick Edwin Johnston

Ronald Andrew Foster

Bennett V Whiteson

James E Dueker

Firearms, and components of firearms, improve shooting accuracy and tolerance to debris/elements that may enter the receiver during use of the firearm in the field. The outer surface of the barrel and the receiver inner surface, and/or the bolt lugs and the receiver inner surface may feature tight-tolerance or press-fit mating, to enhance axial alignment for shooting accuracy. The bolt lugs may be configured to provide said tight-tolerance mating with the receiver when in the loaded and locked position, but may also be configured to provide space for accommodating debris/elements that enter the firearm so that bolt movement is not hindered by the debris/elements, and operation of the bolt, including cycling of the bolt in the firearm action when the shooter goes to load the next round, is smooth and consistent.

Firearms and components thereof featuring enhanced bolt lug shapes

Firearms, and components of firearms, improve shooting accuracy, due to increased coaxial alignment between the receiver and the barrel of the firearm. The outer surface of the barrel and the receiver inner surface feature extremely-tight-tolerance/press-fit mating of one or more outer axial mating surfaces of the barrel with one or more axial portions of the receiver inner surface. The extremely-tight-tolerance/press-fit axial mating surfaces may be distal of, proximal of, in-between, and/or otherwise outside and separate from the threads or conventional connection means for connecting the barrel to the receiver.

Firearms and components thereof, for enhanced axial alignment of barrel with action

An improved radiation protection louver system is described which comprises a movable louver panel hinged to a rotatable shaft through a thermally sensitive closure hinge member comprising a martensitic structure alloy exhibiting the characteristic of changing its shape from an intermediate configuration to a predetermined configuration in response to exposure to high intensity radiation. Motor drive means is included to reshape the hinge to the desired intermediate configuration following a temperature excursion effecting change of configuration.

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Boise, ID, United States of America

Ronald C Foster