Abstract: Provided herein are buffer systems, bolt assemblies, firearms, and related methods, devices, and assemblies. A bolt carrier assembly for a firearm of an example includes: a bolt carrier body defining a cavity extending along a longitudinal axis of the bolt carrier; at least one weight disposed within the cavity; a forward stop at a forward end of the cavity; and an aft stop at an aft end of the cavity. In some embodiments, the bolt carrier assembly may include a spring, where the spring biases the at least one weight along the longitudinal axis toward at least one of the forward stop or the aft stop, where the at least one weight is configured to be driven against the spring bias in response to a firing action of the firearm.

Abstract: The different illustrative embodiments provide a method and apparatus for installing an edge seal. In one illustrative example, a pre-cured edge seal is placed on an edge of a composite structure with a sealant to form a placed pre-cured edge seal. The placed pre-cured edge seal is then cured on the composite structure. In another illustrative embodiment, an edge of a structure is prepared with solvent, and a brush coat of sealant is applied to the top and the edge of the structure. A fillet is applied to the base of the edge of the structure. A pre-cured edge seal is applied to the edge of the structure, and the edge is cured.

Abstract: The present invention relates to a device for scraping material from the earth. The device has a scraper housing, which may be attached to the front of a bulldozer or other earthmoving vehicle. The scraper housing may generally include a back wall, a first side wall, a second side wall, a center support, and a brace. The device may be equipped with a scraper blade attached to an earth transfer plate, the scraper blade attached proximate to the front of the scraper housing. As the scraper housing is urged forward, the scraper blade scrapes material from the earth which, by the force of the material being scraped, is forced along the earth transfer plate. After reaching the end of the earth transfer plate, the material can be deposited onto a scraper conveyor that has a belt extending between the side walls of the housing. The scraper conveyor belt continuously moves material toward an opening in the second wall.