Firearm accessory mounts
A firearm accessory mounting device is disclosed, comprising a nut, a collar coupled to the nut, and a follower captured between the collar and within a cam track of the nut. When the nut is rotated relative to the collar, threaded engagement secures the nut to the collar. Once the threaded engagement causes a torque threshold to be reached, further rotation of the nut causes the follower to extend radially inward to create a compressive force on a muzzle device and quickly and stably attach the firearm accessory mounting device.
1 . A firearm accessory mounting device, comprising:
a collar extending along an axis and defining an exit side opposite a barrel side, the collar defining a first end at the barrel side thereof, an insert formed at the first end of the collar;
a nut coupled to the collar at the barrel side of the collar, the nut defining a nut barrel side and a nut exit side, an inner surface of the nut defining a nut bore extending through the nut from the nut barrel side to the nut exit side, the nut defining an annular flange extending radially inward relative to the axis at the nut barrel side, the annular flange defining a transverse surface extending radially inward relative to the axis proximate the nut barrel side and facing the nut exit side, the nut defining a cam track formed in the transverse surface; and
a follower at least partially received within the insert of the collar and engaging the cam track of the nut;
wherein the first end of the collar is arranged within the nut bore and confronts the inner transverse surface of the nut; and
wherein the cam track extends only partially through the annular flange.
2 . The firearm accessory mounting device of claim 1 , wherein the follower is a first follower and the cam track is a first cam track, the firearm accessory mounting device further comprising a second follower and a second cam track defined in the transverse surface of the nut, and wherein the collar further comprises a pin located within an arcuate track of the nut.
3 . The firearm accessory mounting device of claim 1 , wherein the follower is a first follower and the nut couples to the first follower and a second follower, and wherein when the nut is rotated relative to the collar from an unlocked configuration to a locked configuration in which the first follower and the second follower move radially inward relative to the axis.
4 . The firearm accessory mounting device of claim 1 , wherein the follower is coupled to and at least partially received within the insert at the barrel side of the collar.
5 . The firearm accessory mounting device of claim 4 , wherein the stem of the follower is at least partially captured by the cam track of the nut, the cam track of the nut receiving the stem and being partially offset such that the cam track is not colinear with a radius of the collar.
6 . The firearm accessory mounting device of claim 1 , wherein the follower is located on the barrel side of the collar and comprises a stem and teeth.
7 . The firearm accessory mounting device of claim 1 , wherein:
a port is defined at the first end of the collar;
a pin is at least partially received within the port; and
the pin engages and follows an arcuate track within the nut.
8 . A firearm, comprising:
a stock configured to be held by a user of the firearm;
an action configured to load and discharge the firearm;
a barrel configured to pressurize and eject a projectile;
a muzzle device coupled to an end of the barrel;
a firearm accessory mounting device coupled to the muzzle device, comprising:
a collar extending along an axis and defining an exit side opposite a barrel side, the collar defining a first end at the barrel side thereof, an insert formed at the first end of the collar;
a nut coupled to the collar at the barrel side of the collar, the nut defining a nut barrel side and a nut exit side, an inner surface of the nut defining a nut bore extending through the nut from the nut barrel side to the nut exit side, the nut defining an annular flange extending radially inward relative to the axis at the nut barrel side, the annular flange defining a transverse surface extending radially inward relative to the axis proximate the nut barrel side and facing the nut exit side, the nut defining a cam track formed in the transverse surface; and
a follower engaging the cam track;
wherein the first end of the collar is arranged within the nut bore and confronts the inner transverse surface of the nut; and
wherein the cam track extends only partially through the annular flange; and
a can coupled to the firearm accessory mounting device.
9 . The firearm of claim 8 , wherein the nut comprises an arcuate track that receives a pin extending into the arcuate track.
10 . The firearm of claim 9 , wherein the pin is rigidly supported within the arcuate track and not coupled to the follower, wherein the pin is rigidly coupled to and supported by the collar.
11 . The firearm of claim 8 , wherein the follower is a first follower and the nut couples to the first follower and a second follower, and wherein:
the nut is rotated relative to the collar from an unlocked configuration to a locked configuration;
the first follower and the second follower extend radially inward relative to the axis; and
a stem extends into the cam track of the nut.
12 . The firearm of claim 11 , wherein the first follower and the second follower are located on the barrel side of the collar, and the first follower and the second follower comprise the stem and teeth.
13 . The firearm of claim 12 , wherein the stem of the first follower is at least partially captured by the cam track of the nut, the cam track of the nut receiving the stem of the first follower and being partially offset such that the cam track is not colinear with a radius of the collar.
14 . The firearm of claim 8 , wherein:
a port is defined at the first end of the collar;
a pin is at least partially received within the port; and
the pin engages and follows an arcuate track within the nut.
15 . A method, comprising:
attaching a muzzle device to a barrel of a firearm;
attaching a firearm accessory device to the muzzle device, the firearm accessory device comprising:
a collar extending along an axis and defining an exit side opposite a barrel side, the collar defining a first end at the barrel side thereof, an insert formed at the first end of the collar;
a nut coupled to the collar at the barrel side of the collar, the nut defining a nut barrel side and a nut exit side, an inner surface of the nut defining a nut bore extending through the nut from the nut barrel side to the nut exit side, the nut defining an annular flange extending radially inward relative to the axis at the nut barrel side, the annular flange defining a transverse surface extending radially inward relative to the axis proximate the nut barrel side and facing the nut exit side, the nut defining a cam track formed in the transverse surface; and
a follower engaging the cam track;
wherein the first end of the collar is arranged within the nut bore and confronts the inner transverse surface of the nut; and
wherein the cam track extends only partially through the annular flange; and
attaching a can to the firearm accessory device.
16 . The method of claim 15 , wherein:
the collar defines external threads on the exit side and at least partially captures the follower;
the cam track of the nut receives a stem; and
attaching the can to the firearm accessory device further comprises threadedly rotating the can about the external threads on the collar; wherein when a torque to rotate the can reaches a threshold, the firearm accessory device rotates the collar relative to the nut to move the follower radially inward against the muzzle device.
17 . The method of claim 15 , wherein an arcuate track of the nut is attached to at least one pin that is not coupled to the follower.
18 . The method of claim 15 , wherein the can is coupled to an attachment assembly on the exit side of the firearm accessory device.
19 . The method of claim 18 , wherein the collar is one of a plurality of threadedly engaged collars and the can is threadedly secured to the muzzle device.
20 . The method of claim 15 , wherein:
a port is defined at the first end of the collar;
a pin is at least partially received within the port; and
the pin engages and follows an arcuate track within the nut.