Cover kit for a firearm handguard

Patent metadata

Field	Value
Publication number	US-9702655-B2
Application number	US-201514945925-A
Country	US
Kind code	B2
Filing date	Nov 19, 2015
Priority date	Dec 3, 2014
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A system and method for a user's appendages when firing a weapon is described. One embodiment includes a cover kit for a firearm handguard. The kit has a base and an insert. The base has a longitudinal axis, an upright axis, a transverse axis, a socket, an exterior surface, and an interior surface. The insert has an insert body and a plug. The socket has a movable engagement prong shaped to engage a wall surface of a handguard slot. The plug has a prong engagement surface shaped to engage the engagement prong. The plug is shaped to apply a force on the engagement prong such that a distal portion of the engagement prong is flexed more than a proximal portion of the engagement prong.

First claim

What is claimed is:

1. A cover kit for a firearm handguard, the kit comprising:
a base, the base comprising a longitudinal axis, an upright axis, a transverse axis, a socket shaped to engage a slot in a wall of a firearm, an exterior surface, and an interior surface, the socket comprising a movable engagement prong shaped to engage a wall surface of the slot, the socket further comprising a socket ledge; and
a removable insert, the insert comprising an insert body and a plug, the insert body shaped to abut the exterior surface of the base, the plug having a ledge flange and a prong engagement surface, the prong engagement surface shaped to engage the engagement prong, the plug further shaped to apply a first force on the engagement prong, the ledge flange shaped to apply a second force on the socket ledge when the plug is inserted in the socket; wherein
the first force is configured to cause the engagement prong to expand to engage the wall surface to prevent removal of the cover kit from the firearm handguard when the cover kit is installed on the handguard and the plug is inserted in the socket; and
the second force is an upward force.

2. The cover kit of claim 1 , wherein:
the plug is shaped to apply one of a downward transverse force or a downward longitudinal force on a distal portion of the engagement prong.

3. The cover kit of claim 1 , wherein:
the interior surface of the base comprises a plurality of abutting surfaces movable relative to one another.

4. The cover kit of claim 3 , wherein:
the base is a unitary base made of a material that is at least as flexible as the insert; and
the plurality of abutting surfaces comprise a first abutting surface in a transverse plane, a second abutting surface angled relative to the first abutting surface, and a third abutting surface opposing the second abutting surface; wherein
notched material regions join the second and third abutting surfaces to the first abutting surface.

5. The cover kit of claim 1 , wherein:
the engagement prong flexes outward when the plug is inserted into the socket.

6. The cover kit of claim 1 , wherein:
the insert comprises a second plug and a thin material region in the insert body, the thin material region shaped to facilitate separating the insert into two inserts.

7. The cover kit of claim 1 , wherein:
the base comprises a support for a removal tool.

8. The cover kit of claim 7 , wherein:
the base is shaped to provide a gap between a portion of the exterior surface of the base and a portion of an interior surface of the insert body when the base and the insert are assembled; and
at least a portion of the gap is upright of the engagement prong.

9. The cover kit of claim 1 , wherein:
the engagement prong has a curved engagement surface and an angled plug engagement wall; and
the plug is shaped to apply a substantially downward force followed by a substantially horizontal force on the plug engagement wall as the plug is inserted into the socket.

10. The cover kit of claim 1 , further comprising:
a notched material region joining the engagement prong to a body of the base.

11. The cover kit of claim 1 , wherein:
the ledge flange is not parallel to the prong engagement surface of the plug.

12. The cover kit of claim 1 , wherein:
the first force and the second force are not parallel.

13. The cover kit of claim 1 , wherein:
an interior region of the plug extends through a through passage of the socket when the cover kit is assembled such that a distal region of the plug and a proximal region of the plug are not within the through passage of the socket; and
a distal portion of the engagement prong is displaced more than a proximal portion of the engagement prong when the base and the insert are assembled.

14. The cover kit of claim 1 , wherein:
the base is made of a flexible resilient material.

15. The cover kit of claim 1 , wherein:
the base comprises a longitudinal recess; and
the insert is shaped to nestle within the longitudinal recess.

16. A method of protecting a user's appendages when firing a weapon, the method comprising:
providing a weapon handguard and a cover kit, the cover kit having a base and an insert, the base comprising a longitudinal axis, an upright axis, a transverse axis, and a socket having an engagement prong and a socket ledge, the insert comprising a plug having a ledge flange, the insert made of a material that is as flexible or less flexible than the base;
attaching the base to a handguard by inserting the engagement prong into a slot of the handguard; and
inserting the plug into the socket; wherein
inserting the plug causes the ledge flange to apply a longitudinal force on the socket ledge, the plug to apply a transverse force on the engagement prong, and the plug to preclude the engagement prong from disengaging from the slot, the inserting thereby preventing removal of the cover kit from the handguard until the plug is removed from the socket.

17. The method of claim 16 , wherein:
inserting the plug further causes a handguard engagement surface of the engagement prong to engage a wall of the handguard slot.

18. The method of claim 16 , further comprising:
adjusting the base such that at least one of a plurality of handguard abutting surfaces in a base body of the base abuts an exterior surface of the handguard.

19. The method of claim 16 , further comprising:
separating the insert into two inserts by bending the insert at a thin material region in the insert body.

20. The method of claim 16 , further comprising:
removing the insert from the base by inserting a removal tool into a gap between the insert and a recess in the base; and
prying the insert from the base.

21. The method of claim 16 , further comprising:
causing the ledge flange in the plug to engage the socket ledge in the socket; and
causing a prong engagement surface in the plug to engage the engagement prong; wherein
the ledge flange is not parallel to the prong engagement surface.

22. A cover assembly for a firearm handguard, the assembly comprising:
a primary cover having a free configuration and a handguard engagement configuration, the handguard engagement configuration comprising engagement with at least two opposing wall surfaces of an elongated handguard slot and an exterior surface of the handguard; and
an adjustment cover; wherein
the primary cover is shaped to cover at least a portion of an external surface of a handguard;
the adjustment cover is shaped to nestle within the primary cover and cause the primary cover to apply a first force on each of the two opposing wall surfaces, thereby causing the primary cover to prevent the cover assembly from disengaging from the handguard; and
the adjustment cover is further shaped to apply an upward force on a ledge in the primary cover when the adjustment cover is nestled within the primary cover.

23. The cover kit of claim 1 , wherein:
the first force has a transverse component relative to the longitudinal axis; and
the second force is an upward longitudinal force.

24. The cover kit of claim 23 , wherein:
the first force does not have a longitudinal component relative to the longitudinal axis.

Assignees

• Magpul Ind Corp

Inventors

• Nakayama Brian L
• Miller Christopher F
• Mayberry Michael T
• Kielsmeier Nicholas
• Fitzpatrick Richard M

Classifications

• F16B19/1081

  fastened by a drive-pin (F16B19/109 takes precedence) · CPC title

• F41C23/16 Primary

  Forestocks; Handgrips; Hand guards (pump-action guns F41C7/02) · CPC title

• Y10T24/45262

  Pin, post and receiver · CPC title

• F41A35/00

  Accessories or details not otherwise provided for · CPC title

• F41A35/02 Primary

  Dust- or weather-protection caps or covers (protecting-caps for trigger guards F41A17/54) · CPC title