Fire control group

A trigger module for a firearm having a receiver with opposed receiver sidewalls defining a plurality of pin apertures, the module comprising:

• a module housing having module sidewalls with opposed parallel external wall surfaces defining a module width;
• a hammer pin extending transversely though the module sidewalls and having a length greater than the module width such that the hammer pin ends are configured to be received in opposed pin apertures of the receiver;
• the module housing defining a threaded aperture at a rear portion of the module housing;
• the threaded aperture being oriented to receive a grip screw received by and engaging a grip to secure the rear portion of the module housing.

A firearm comprising:

• a receiver having opposed sidewalls defining a space configured to removably receive a fire control group;
• the opposed sidewalls each defining a pivot pin aperture;
• the pivot pin apertures being registered with each other;
• a fire control group including a trigger received in the space;
• the fire control group defining a transverse pivot pin passage configured to be registered with the pivot pin apertures of the receiver;
• the fire control group including a pivoting operational element;
• the fire control group including a pivot pin supporting the pivoting operational element and received in the pivot pin passage and the pivot pin apertures;
• the firearm having a hand grip aft of the trigger and defining a screw aperture;
• a grip screw engaging the hand grip and engaging the fire control group;
• wherein the receiver has a wall portion received between the hand grip and the fire control group;
• and
• wherein the wall portion is compressibly received between the hand grip and the fire control group.