Fire control mechanism for a firearm

A firearm comprising:

• a frame, and a firing pin operably disposed in a breech block located on the frame;
• a sear pivotally connected to the frame about a fulcrum and having forward and rearward portions on opposite sides of the fulcrum, wherein the rearward portion is configured for selectively engaging the firing pin;
• a trigger bar having a receiving surface, the trigger bar engaging the forward portion of the sear and configured for actuating the sear to release the firing pin when the trigger bar is moved rearwards;
• and
• a slide operably connected to the frame and having a camming surface on an undersurface thereof;
• wherein the camming surface engages the receiving surface on the trigger bar upon a movement of the slide in a rearwards direction;
• and
• wherein the movement of the slide in a rearwards direction causes the camming surface to exert a lateral force on the trigger bar to bias the trigger bar laterally out of registration with the sear.

A firearm comprising:

• a frame, and a trigger bar having a receiving surface, the trigger bar being operably disposed in the frame;
• a firing pin;
• a sear operably mounted in the frame for controllably releasing the firing pin upon actuation of the trigger bar;
• and
• a slide operably connected to the frame and having a camming surface on an undersurface thereof;
• wherein the camming surface engages the receiving surface on the trigger bar upon a movement of the slide in a rearwards direction;
• and
• wherein the movement of the slide in a rearwards direction causes the camming surface to exert a lateral force on the trigger bar to bias the trigger bar laterally out of registration with the sear.

A firearm comprising:

• a frame with a magazine well;
• a firing mechanism operably housed in the frame and having a sear and a trigger bar engagable with the sear;
• a magazine detection lever operably engagable with the trigger bar;
• and
• a biasing member acting upon the magazine detection lever to urge an arm portion thereof into the magazine well, wherein the magazine detection lever biases the trigger bar into disengagement from the sear unless a magazine is fully inserted into magazine well against the arm portion of the lever, wherein the magazine detection lever biases the trigger bar into lateral disengagement from the sear.

A firearm comprising:

• a frame, and a trigger connected to the frame;
• a trigger bar connected to the trigger for rearwards movement when the trigger is actuated;
• a firing pin operably disposed in a breech block located on the frame;
• a sear pivotally connected to the frame about a fulcrum and having forward and rearward portions on opposite sides of the fulcrum, said forward portion being configured for engagement with the trigger bar and said rearward portion being configured for engagement with the firing pin;
• and
• a sear biasing member operably disposed in the frame for biasing the sear in a first pivotal direction for engaging the firing pin;
• wherein the trigger bar is configured to pivot the sear in a second pivotal direction against the action of the sear biasing member, when the trigger bar is moved in a rearwards direction, for selective disengagement of the rearward sear portion from the firing pin, whereby said firing pin thereafter moves forward for discharge of the firearm;
• and
• wherein the sear fulcrum is located substantially at a center of mass of the sear.

A firearm comprising:

• a frame, and a trigger connected to the frame;
• a trigger bar connected to the trigger for rearwards movement when the trigger is actuated;
• a firing pin operably disposed in a breech block located on the frame;
• a sear pivotally connected to the frame about a fulcrum and having forward and rearward portions on opposite sides of the fulcrum, said forward portion being configured for engagement with the trigger bar and said rearward portion being configured for engagement with the firing pin;
• a sear biasing member operably disposed in the frame for biasing the sear in a first pivotal direction for engaging the firing pin;
• and
• a magazine detection lever operably connected to the frame and configured for disengaging the trigger bar from the sear when a magazine well portion of the frame is without a magazine fully inserted therein;
• wherein the trigger bar is configured to pivot the sear in a second pivotal direction against the action of the sear biasing member, when the trigger bar is moved in a rearwards direction, for selective disengagement of the rearward sear portion from the firing pin, whereby said firing pin thereafter moves forward for discharge of the firearm.