Abstract: Methods, systems and devices for an adjustable gas block with variable gas port dimensions to control the amount of gas in the gas block before the gas enters into the gas tube. The adjustable gas block includes a gas block barrel bore to slide over a barrel and a gas tube bore to mate with the firearm gas tube, a gas port between the barrel bore and the gas tube bore, a sliding regulator plate to slide one of the gas ports into alignment with the block gas port and the barrel gas port, and a spring and detent pin to hold the sliding regulator plate in alignment with the barrel gas port. An alignment hole in the gas tube bore can align the block gas port with the barrel gas port.

Abstract: Methods, systems and devices for an adjustable gas block with variable gas port dimensions to control the amount of gas in the gas block before the gas enters into the gas tube. The adjustable gas block includes a gas block barrel bore to slide the block over a barrel and a gas tube bore to mate with the firearm gas tube, a gas port between the barrel bore and the gas tube bore, a sliding adjustment plate with different adjustment gas ports to slide one of the gas ports into alignment with the block gas port and the barrel gas port, and a spring to hold the sliding gas port in alignment with the barrel gas port. An alignment hole in the gas tube bore can align the block gas port with the barrel gas port.