Method of locking a handguard to an upper receiver of a firearm

摘要

A method of locking a handguard relative to an upper receiver of a firearm. The method includes providing a wedge assembly having a top wedge member and a bottom wedge member, each having complementary inclined surfaces; a barrel nut that is configured to receive an outer portion of an upper receiver; and a handguard that is configured to receive the barrel nut and the combined wedge assembly within a lower lip of the handguard. The wedge assembly may include an optional assembly screw and a locator pin where the top wedge member and bottom wedge member are tightly joined to each other via the assembly screw and the locator pin. In use, the lock-up system is used to join the handguard and barrel nut to a corresponding upper receiver with little to no play between the handguard and the upper receiver such that the connection between the two via the wedge assembly is intended to be permanent.

主权项

1. A method of locking a handguard of a firearm to a corresponding upper receiver; the method comprising:
providing an upper receiver of a firearm having a first end and a second end; the first end having outer edges and an outwardly extending threaded portion; providing a handguard having a first end and a second end with a bore therebetween; the second end having outer edges that are configured to closely confront the outer edges of the upper receiver; the bore is configured to receive the outwardly extending threaded portion of the upper receiver; the handguard further configured to include a lower lip at the first end, the lower lip having an interior surface; providing a barrel nut having a first end and a second end, said second end configured to receive the outwardly extending threaded portion of the upper receiver and the first end configured to receive a barrel of a firearm; the barrel nut having an outer surface at the first end; providing a wedge assembly having a top wedge with an upper generally indented surface and a lower inclined surface, and a bottom wedge with an upper inclined surface inversely complementary to the inclined surface of the top wedge and a lower surface configured to be received and confront the interior surface of the lower lip of the handguard; securing the second end of the barrel nut to the threaded portion of the upper receiver; sliding the top wedge into contact with the bottom wedge at their respective inclined surfaces and joining the wedge assembly together to form a combined wedge assembly where the two respective inclined surfaces are closely confronting each other; positioning the combined wedge assembly within the interior portion of the lower lip of the handguard with the upper indented surface of the top wedge forming a hollow that is configured to closely receive the outer surface of the barrel nut; squeezing the outer surface of the barrel nut into the hollow of the handguard; and aligning and confronting the two outer edges of the handguard and upper receiver.