Abstract: A gas control mounted in an upper receiver of a weapon. A valve communicates with a gas tube of the weapon to receive gas under pressure from the barrel of the weapon. The valve has a first orifice and a second orifice. The position of the valve is selectable between the first orifice and the second orifice by rotation of a knob positioned on an exterior surface of the upper receiver of the weapon. The orifices are of different sizes to allow regulation of the volume of gas flow to the receiver of the weapon.

Abstract: A sound suppressor for firearms is characterized by a baffle core having a blast chamber that is larger than a remaining plurality of chambers. The blast chamber is proximal to a mounting point of the sound suppressor to a firearm. The baffle core is contained in a body. An external structural frame is positioned externally over a portion of the body, and over the blast chamber.