Patent ID: 8596185

Claim:
An adjustable gas block assembly for a firearm comprising: the adjustable gas block having a gas block barrel bore to slide the adjustable gas block over a barrel of the firearm and a gas tube bore to mate with a gas tube of the firearm, the adjustable gas block further including: a gas port in the adjustable gas block between the barrel bore and the gas tube bore; a sliding adjustment plate having two or more different adjustment plate gas ports movably positioned between the gas block barrel bore and the gas tube bore in the adjustable gas block to slide one of the two or more different adjustment plate gas ports into alignment with the gas port between the barrel bore and the gas tube bore and a barrel gas port; and a spring assembly including a spring coupled with a detent pin located in a trough in the adjustable gas block parallel along a centerline of the barrel of the firearm apply a horizontal force to hold a selected one of the two or more different adjustment plate gas ports in alignment with the barrel gas port; and one or more set screws for attaching the adjustable gas block to the barrel of the firearm.