Abstract: An end plate and castle nut, including at least some of an end plate having at least one pawl, wherein said at least one pawl extends from a biased, tension arm formed in the end plate; and a castle nut having one or more grooves formed in a front face of the castle nut, wherein each of the one or more grooves is formed so as to accept at least a portion of the at least one pawl at least partially therein.

Abstract: A forward assist that includes at least some of a plunger; a partially rotatable, spring biased pawl extending from a portion of the plunger; a projection extending from a first end of the plunger; and at least one head having a recess formed in at least a portion of the, wherein the head recess is mateable with the projection of the plunger, and wherein the head is secured to a first end of the plunger via interaction of the projection and the head recess.

Abstract: A blast shield attachment system that includes a collar having one or more locking notches formed at least partially therethrough and one or more engagement pins extending therefrom; and a blast shield having a collar receiving recess, wherein one or more engagement grooves extend from a first end of the blast shield, wherein one or more levers are pivotably attached or coupled to the blast shield, wherein each lever is pivotable for releasable engagement with a corresponding one of the locking notches of the collar, and wherein when at least a portion of the collar is appropriately received within the collar receiving recess, at least one of the one or more engagement pins is aligned within at least one of the one or more engagement grooves and each lever is releasably engaged with a corresponding one of the locking notches of the collar.

Abstract: A suppressor element having at least some of a body portion having a body cavity defined therein; a shielding portion, wherein the shielding portion is positioned over at least a portion of the body portion, such that a venting cavity is defined between at least a portion of the body portion and at least a portion of the shielding portion; one or more support elements that extend between the body portion and the shielding portion; and a rear cap that extends from a body portion first end, wherein the rear cap includes a mounting aperture, wherein the mounting aperture allows the rear cap to be attached or coupled to a barrel or muzzle device of a firearm, and wherein at least the body portion, the shielding portion, and the one or more support elements, are formed as an integral or monolithic unit.

Abstract: An anti-rotation handguard system, including a barrel nut having a barrel nut aperture formed therethrough, along a longitudinal axis of the barrel nut, wherein the barrel nut includes a registration groove defined around the outer periphery of the barrel nut; and an anti-rotation ring having a barrel nut aperture formed therethrough, wherein the anti-rotation ring further comprises a first anti-rotation tab extending from the anti-rotation ring, wherein the first anti-rotation tab is formed so as to be received within a gas tube channel of a handguard, and wherein the anti-rotation ring further comprises a second anti-rotation tab extending from the anti-rotation ring, wherein the second anti-rotation tab is formed so as to be received within at least a portion of a compression/registration slot of the handguard.

Abstract: A handguard extension system having a handguard, wherein at least one handguard extension receiving channel is formed in a portion of the handguard, wherein at least one alignment/retention slot is formed at least partially through the handguard extension receiving channel so as to at least partially receive a portion of an attachment screw therethrough; and a handguard extension component comprising an attachment portion and an extension portion, wherein the attachment portion is sized so as to be at least partially received within at least a portion of the handguard extension receiving channel, wherein at least one aperture is formed through the attachment portion, wherein the at least one aperture is positioned so as to correspond to one or more of the alignment/retention slots, thereby allowing the attachment screw to secure at least a portion of the attachment portion within handguard extension receiving channel.

Abstract: A muzzle device assembly, including a flash suppressor, wherein the flash suppressor comprises a body having a central bore aperture, and wherein the flash suppressor comprises a plurality of air channel inlets and air channels, wherein the air channel inlets and air channels are in fluid communication with the central bore aperture; and a collar, wherein the collar comprises a plurality of airflow apertures, wherein each airflow aperture corresponds to an air channel inlet, and wherein the collar is rotatable between at least an open position and a closed position relative to the flash suppressor, wherein when the collar is in the open position at least a portion of each airflow aperture is aligned with each air channel inlet.

Abstract: A muzzle device and blast shield. The muzzle device includes a body portion having a central borehole, and wherein the body portion comprises a plurality of prongs defined between longitudinally extending slots formed in the body portion and porting apertures, wherein the porting apertures provide fluid communication between an exterior of the muzzle device and at least one longitudinally extending slot. The blast shield includes a body portion having a central borehole, wherein the body portion comprises a couple portion having an internal cavity, a barrel extension portion extending into at least a portion of the internal cavity, and a plurality of porting apertures, wherein the porting apertures provide fluid communication between an exterior of the blast shield and the internal cavity.

Abstract: A mating bolt carrier and barrel extension, including at least some of a bolt carrier having a front face that includes one or more surface preparations or features formed at least partially thereon or therein; and a barrel extension having a rear face that includes one or more surface preparations or features formed at least partially thereon or therein, wherein at least a portion of the one or more surface preparations or features are capable of mating or interlocking with the surface preparations or features of the front face of the bolt carrier.

Abstract: A 3-D printed suppressor element having at least some of a body portion having a body cavity defined therein; a shielding portion, wherein the shielding portion is positioned over at least a portion of the body portion, such that a venting cavity is defined between at least a portion of the body portion and at least a portion of the shielding portion; one or more support elements that extend between the body portion and the shielding portion; and a rear cap that extends from a body portion first end, wherein the rear cap includes a mounting aperture, wherein the mounting aperture allows the rear cap to be attached or coupled to a barrel or muzzle device of a firearm, and wherein at least the body portion, the shielding portion, and the one or more support elements, are formed as an integral unit, via 3-D printing or additive manufacturing.

Abstract: A blast mitigation device that includes a collar having a central collar aperture formed therethrough and having one or more collar venting apertures and one or more locking notches; and a blast shield having one or more levers, one or more blast shield venting apertures, and a collar receiving recess, wherein each lever is pivotable for releasable engagement with a corresponding locking notch and wherein when at least a portion of the collar is appropriately received within the collar receiving recess, each collar venting aperture is aligned with each blast shield venting aperture.

Abstract: A bolt carrier and removably attachable charging handle including at least some of a bolt carrier having at least one attachment aperture; a handle base having a base attachment portion and a handle attachment portion, wherein the base attachment portion is capable of being removably attached or coupled within at least a portion of the at least one attachment aperture; and a handle sleeve capable of being removably attached or coupled to the handle attachment portion of the handle base.