Firearm trigger mechanism installation device and method

A method for installing a fire control group in a fire control pocket by sidewalls of a lower receiver, the fire control group comprising hammer components and trigger components, the method comprising:

• assembling the fire control group on a fire control group installation tool, wherein the fire control group installation tool comprises:
• a first side having an inner surface, an outer surface opposite the inner surface, and a recess defined in the inner surface, the recess having a first portion for receiving at least a portion of the trigger components and a second portion for receiving at least a portion of the hammer components,
• a second side having an inner surface, an outer surface opposite the inner surface, and a recess defined in the inner surface, the recess having a first portion for receiving at least a portion of the trigger components and a second portion for receiving at least a portion of the hammer components,
• wherein, when first and second sides are assembled together, the inner surfaces of the first and second side contact each other and the recesses of the first and second side cooperate with each other to define a cavity within which the set of trigger components and the set of hammer components are at least partially arranged, the cavity having a bottom opening through which the fire control group may be withdrawn unobstructed by the first and second side, and
• a flexible tie wrapped around the first and second sides for retaining the fire control group relative to the first and second sides in a preloaded state;
• inserting the control group installation tool with the fire control group assembled thereto into the fire control pocket;
• aligning a pin receiving opening in the trigger components with a first pair of aligned openings in the sidewalls, and aligning a pin receiving opening in the hammer components with a second pair of aligned openings in the sidewalls;
• inserting a trigger pin through the first pair of aligned openings and the pin receiving opening in the trigger components, and inserting a hammer pin through the second pair of aligned openings and the pin receiving opening in the hammer components;
• unfastening the flexible ties;
• and
• removing the control group installation tool from the fire control pocket.

A kit for a firearm, comprising:

• a fire control group comprising:
• a set of trigger components, and
• a set of hammer components;
• and
• a fire control group installation tool comprising:
• a first side having an inner surface, an outer surface opposite the inner surface, and a recess defined in the inner surface, the recess having a first portion for receiving at least a portion of the trigger components and a second portion for receiving at least a portion of the hammer components,
• a second side having an inner surface, an outer surface opposite the inner surface, and a recess defined in the inner surface, the recess having a first portion for receiving at least a portion of the trigger components and a second portion for receiving at least a portion of the hammer components,
• wherein, when first and second sides are assembled together, the inner surfaces of the first and second side contact each other and the recesses of the first and second side cooperate with each other to define a cavity within which the set of trigger components and the set of hammer components are at least partially arranged, the cavity having a bottom opening through which the fire control group may be withdrawn unobstructed by the first and second side, and
• a flexible tie wrapped around the first and second sides for retaining the fire control group relative to the first and second sides in a preloaded state.