Recoil system for a self-loading firearm

A firearm comprising:

• a body defining a bolt passage on a bolt axis, and configured for attachment of a barrel to a forward portion of the body in line with the bolt axis, and having a rear mount facility registered with the bolt axis;
• a capture element connected to the rear mount facility and having a floor surface facing a forward direction along the bolt axis;
• a guide rod connected to the capture element and extending along the bolt axis;
• a first spring closely encompassing the guide rod and having a first spring rear end abutting the floor surface of the capture element;
• a first sleeve defining a first sleeve bore closely encompassing the first spring and having a first sleeve forward end portion abutting a forward end of the first spring;
• a second spring closely receiving the first sleeve and having a second spring rear end abutting a rear portion of the first sleeve;
• a second sleeve defining a second sleeve bore closely encompassing the second spring and having a second sleeve forward end portion abutting a forward end of the second spring;
• a third spring closely receiving the second sleeve and having a third spring rear end abutting a rear portion of the second sleeve;
• and
• a bolt carrier having a rear end with a rear face abutting a forward end of the third spring and defining an opening receiving the second sleeve forward end portion.