Patent attributes
An adjustable gas block may include an ingress port to receive gas expelled from a gas port located on a firearm barrel, and a front end to receive a gas metering screw, wherein the gas metering screw is drivable into a threaded hole in the front end to at least partially cover the ingress port with an end of the gas metering screw to restrict a flow of the gas, according to various embodiments. In some embodiments, a columnar sidewall of the head of the gas metering screw may include a circumferential marking alignable with an alignment feature of the front end of the adjustable firearm gas block to set a predefined gas flow restriction. In some embodiments, the adjustable gas block may include a columnar projection with a section alignable with an individual one of the indentations or bumps to preserve a rotational position of the gas metering screw.
