Firearm fire control selector
View Patent ↗An automatic firearm capable of automatic or semiautomatic fire. The firearm has a receiver having a moveable hammer. A selector is rotatably mounted in the receiver. A first sear is rotatably mounted in the receiver to engage the hammer where the first sear contacts a first camming surface of the selector. A second sear is rotatably mounted in the receiver to engage the hammer where the second sear contacts a second camming surface of the selector. A disconnect is rotatably mounted in the receiver where the disconnect contacts a third camming surface of the selector. The selector has a number of selectable positions disposed so that rotation of the selector between a first and last selectable position of the number of selectable positions is less than 180 degrees.
1. An automatic firearm with a fire control selector, the selector comprising:
an automatic sear camming surface;
a trigger camming surface disposed adjacent the automatic sear camming surface; and
a disconnect camming surface disposed adjacent the trigger camming surface;
the automatic sear camming surface, the trigger camming surface and the disconnect camming surface being arranged so that, when the selector is installed in a firearm receiver, the automatic sear camming surface, the trigger camming surface and the disconnect camming surface respectively engage an automatic sear, a trigger and a disconnect of the firearm to select a firearm operation mode;
wherein, rotation of the fire control selector between a selectable end position, from selectable positions of the fire control selector, and another selectable end position is less than 180 degrees, and wherein the trigger camming surface has a land contacting the trigger when the fire control selector is in a semiautomatic position, and wherein the trigger camming surface further has a step projecting from the land, the step contacting the trigger when the fire control selector is in a safe position.
2. The automatic firearm of claim 1 , wherein the sear camming surface has a notch and wherein a leg of the automatic sear is accepted in the notch when the fire control selector is in a fully automatic position.
3. The automatic firearm of claim 2 , wherein the sear camming surface has first and second engagement surfaces and wherein the leg of the automatic sear contacts the first engagement surface when the fire control selector is in the semiautomatic position and wherein the leg of the automatic sear contacts the second engagement surface when the fire control selector is in the safe position.