Slotted trigger actuation

1. A firearm, comprising:

a firearm receiver; and

a fire control group installed in the firearm receiver and comprising:

a striker configured to engage ammunition chambered in the firearm;

a sear mechanically coupled to the striker;

a trigger bar mechanically coupled to the sear; and

a trigger assembly with a trigger body pivotable between a resting position and a firing position, the trigger bar configured with a slot extending parallel to a bore axis at an interface between the trigger body and the trigger bar,

wherein the trigger body is configured to be movable between the resting position, an intermediate position and the firing position, the sear in a first position when the trigger body is in either the resting position or the intermediate position, and the sear is in a second position different from the first position when the trigger body is in the firing position, the intermediate position being at least 2 mm from each of the resting position and the firing position.

2. The firearm of claim 1 , further comprising an arm connected to the trigger body and extending generally opposite of the trigger body from a pivot axis, the arm disposed in operational engagement with the trigger bar.

3. The firearm of claim 2 , wherein the arm defines a protrusion extending generally parallel to the pivot axis and wherein the trigger bar defines a slot configured to receive the protrusion and guide the protrusion to move within the slot between a proximal slot end and a distal slot end.

4. The firearm of claim 2 , wherein the trigger bar defines a protrusion extending generally parallel to the pivot axis and wherein the arm defines a slot configured to receive the protrusion and guide the protrusion to move within the slot between a proximal slot end and a distal slot end.

5. The firearm of claim 3 , wherein the protrusion is configured to slide proximally and distally within the slot.

6. The firearm of claim 5 , wherein the protrusion is configured to act as a fulcrum to lever trigger movement against an opposed motion of the trigger bar.

7. The firearm of claim 3 , wherein the slot is an oval-shaped slot or a rectangular slot with two rounded ends.

8. The firearm of claim 1 , wherein the spring is disposed between a trigger stop on the firearm receiver and a proximal portion of the trigger body.

9. A firearm, comprising:

a trigger body;

a sear, mechanically coupled to the trigger body; and

a trigger bar configured with a slot extending parallel to a bore axis at an interface between the trigger body and the trigger bar,

wherein the trigger body is configured to be movable between a resting position, an intermediate position and a firing position, the sear is in a first position when the trigger body is in either the resting position or the intermediate position, and the sear is in a second position different from the first position when the trigger body is in the firing position, the intermediate position being at least 2 mm from each of the resting position and the firing position.

10. The firearm of claim 9 , wherein the trigger bar is in a first position when the trigger body is in either the resting position or the intermediate position, and the trigger bar is in a second position different from the first position when the trigger body is in the firing position.

11. The firearm of claim 9 , wherein a proximal portion of the trigger body is configured to receive a bolt extending from a pin in a firearm receiver, surrounded at least in part by a spring.

12. The firearm of claim 11 , wherein the spring is configured to require a pullback force of greater than about 7 lbs. to enable motion of the trigger body.

13. The firearm of claim 9 , wherein only a portion of rearward trigger movement causes longitudinal movement of the trigger bar.

14. A method, comprising:

providing a firearm, comprising a firearm receiver, a fire control group installed in the firearm receiver and comprising a striker configured to engage ammunition chambered in the firearm, a sear, a trigger bar mechanically coupled to the sear, a trigger assembly with a trigger body pivotable between a resting position and a firing position, the trigger bar configured with a slot extending parallel to a bore axis at an interface between the trigger body and the trigger bar, wherein the trigger body is configured to be movable between a resting position, an intermediate position and a firing position, the sear is in a first position when the trigger body is in either the resting position or the intermediate position, and the sear is in a second position different from the first position when the trigger body is in the firing position, the intermediate position being at least 2 mm from each of the resting position and the firing position;

grasping the trigger body;

pulling back on the trigger body to a first distance;

pulling back on the trigger body to a second distance; and

longitudinally moving the trigger bar only after the trigger body has been pulled back to the second distance.

15. The method of claim 14 , wherein movement of the trigger body to the first distance does not result in trigger bar motion toward the sear.

16. The method of claim 14 , wherein the first distance is about 3 mm and the second distance is about 5 mm.

17. The method of claim 14 , wherein the sear is mechanically coupled to at least one of the trigger body and the striker.

18. The method of claim 14 , further comprising actuating the sear only after the trigger body has been pulled back to the second distance.

19. The method of claim 18 , wherein a second slot is positioned directly in the sear to facilitate a two-stage trigger activation.