Recoil assembly for a machine gun

A recoil assembly for a rifle, the assembly comprising:

• a barrel assembly including a barrel extension and a barrel, the barrel secured to a distal end of the barrel extension and defining a bore along a bore axis, the barrel extension defining a longitudinal opening therethrough along the bore axis;
• a bolt assembly received in the barrel extension and slidable within the longitudinal opening along the bore axis, the bolt assembly comprising a bolt having a proximal end portion defining an opening, and a bolt actuator having a distal end portion slidably received in the opening in the proximal end portion of the bolt;
• a gas block on the barrel, the gas block in fluid communication with the bore and including a gas piston extending rearward from the gas block along the barrel, the gas piston axially displaceable in response to pressurized gas in the bore;
• an operational rod positioned proximally of and operatively coupled to the gas piston;
• a connector coupled to the operational rod and to the bolt actuator, wherein part of the connector is received through a slot defined in the barrel extension;
• and
• a hydraulic buffer assembly coupled to the barrel extension.

A rifle receiver assembly comprising:

• a rifle receiver defining a longitudinal opening therethrough;
• a barrel assembly slidably received in the longitudinal opening, the barrel assembly including a barrel secured to a barrel extension, the barrel defining a bore along a bore axis;
• a hydraulic buffer assembly below and operatively coupled to a proximal end portion of the barrel extension;
• a bolt assembly slidably received in the barrel extension, the bolt assembly including a bolt having a proximal end portion defining an opening, and a bolt actuator having a distal end portion received in the opening in proximal end portion of the bolt;
• a connector on the bolt actuator, wherein part of the connector extends through the barrel extension;
• a gas piston assembly on the barrel and in fluid communication with the bore, the gas piston assembly including a gas piston axially displaceable in response to pressurized gas in the bore;
• and
• an operational rod coupled at a distal end to the gas piston and coupled at a proximal end to the bolt actuator via the connector;
• wherein the barrel assembly is free floating with respect to the receiver.