Quick Barrel Change Firearm
First Claim
Patent Images
1. A firearm comprising:
- a bolt carrier;
a backbone configured to guide the bolt carrier;
a lower receiver within which the bolt carrier is at least partially disposed, wherein the backbone is removably attached to the lower receiver;
a barrel latch attached to the backbone;
a barrel configured to disengage from the backbone when the barrel latch is pushed;
a trigger block assembly configured to drop into the lower receiver;
a gas piston having a plurality of piston rings configured to only rotate substantially in unison with one another, wherein the gas piston is configured to move the bolt carrier when a cartridge is discharged;
a metered gas port disposed out of the barrel for metering gas from the barrel to the gas piston;
a spring guide having a main spring disposed thereon for biasing the bolt carrier in a forward position;
an anti-bounce weight at least partially contained within the spring guide;
a bolt carried by the bolt carrier;
an extractor attached to the bolt;
two springs disposed within the bolt for biasing the extractor toward a closed position of the extractor;
a bar inhibiting separation of the lower receiver and the backbone when the main spring is compressed;
a firing pin disposed within the bolt;
one of;
a firing pin retaining pin configured to facilitate removal of the firing pin and configured to transfer forward movement of the bolt carrier to the firing pin to cause a cartridge to fire;
a hammer assembly disposed within the lower receiver and having a hammer and a link with one end of the link attached to the hammer and another end of the link attached to the lower receiver such that the hammer has a rearward position that is below the bolt when the bolt is in a rearward position and the hammer has a forward position where the hammer strikes the firing pin when the bolt is in a forward position and wherein the link is configured such that the hammer has sufficient throw to travel over a last round stop as the hammer moves from the rearward position to the forward position wherein the link, not the hammer, has notches actuated by a trigger motion;
a takedown lever configured to inhibit separation of the backbone and the lower receiver, the takedown lever having a safety lock pin to inhibit inadvertent movement of the takedown lever;
a charging handle configured to move rearward to move the bolt carrier from a closed bolt position to an open bolt position;
a dust cover configured to open partially to allow the charging handle to move rearward and to block bolt release from open bolt position until the cocking handle has returned forward;
a gas port flash suppressor configured to guide the barrel during mating of the barrel to the backbone; and
a stock having a handle formed therein, wherein a projection is configured to inhibit vertical movement of a stock.
1 Assignment
0 Petitions
Accused Products
Abstract
A firearm can have a backbone, a barrel, a swinging wedge, and a barrel latch, in accordance with one or more embodiments. The barrel latch can be in mechanical communication with the swinging wedge. The barrel latch can have a first position and a second position and the swinging wedge can be configured to maintain attachment of the barrel to the backbone when the barrel latch is in the first position and is configured to release the barrel from the backbone when the barrel latch is in the second position. Thus, the firearm can provide quick barrel changes. Other features enhance the reliability and utility of the firearm.
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Citations
18 Claims
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1. A firearm comprising:
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a bolt carrier; a backbone configured to guide the bolt carrier; a lower receiver within which the bolt carrier is at least partially disposed, wherein the backbone is removably attached to the lower receiver; a barrel latch attached to the backbone; a barrel configured to disengage from the backbone when the barrel latch is pushed; a trigger block assembly configured to drop into the lower receiver; a gas piston having a plurality of piston rings configured to only rotate substantially in unison with one another, wherein the gas piston is configured to move the bolt carrier when a cartridge is discharged; a metered gas port disposed out of the barrel for metering gas from the barrel to the gas piston; a spring guide having a main spring disposed thereon for biasing the bolt carrier in a forward position; an anti-bounce weight at least partially contained within the spring guide; a bolt carried by the bolt carrier; an extractor attached to the bolt; two springs disposed within the bolt for biasing the extractor toward a closed position of the extractor; a bar inhibiting separation of the lower receiver and the backbone when the main spring is compressed; a firing pin disposed within the bolt; one of; a firing pin retaining pin configured to facilitate removal of the firing pin and configured to transfer forward movement of the bolt carrier to the firing pin to cause a cartridge to fire; a hammer assembly disposed within the lower receiver and having a hammer and a link with one end of the link attached to the hammer and another end of the link attached to the lower receiver such that the hammer has a rearward position that is below the bolt when the bolt is in a rearward position and the hammer has a forward position where the hammer strikes the firing pin when the bolt is in a forward position and wherein the link is configured such that the hammer has sufficient throw to travel over a last round stop as the hammer moves from the rearward position to the forward position wherein the link, not the hammer, has notches actuated by a trigger motion; a takedown lever configured to inhibit separation of the backbone and the lower receiver, the takedown lever having a safety lock pin to inhibit inadvertent movement of the takedown lever; a charging handle configured to move rearward to move the bolt carrier from a closed bolt position to an open bolt position; a dust cover configured to open partially to allow the charging handle to move rearward and to block bolt release from open bolt position until the cocking handle has returned forward; a gas port flash suppressor configured to guide the barrel during mating of the barrel to the backbone; and a stock having a handle formed therein, wherein a projection is configured to inhibit vertical movement of a stock.
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2. A firearm comprising:
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a bolt carrier; a backbone configured to guide the bolt carrier; a lower receiver within which the bolt carrier is at least partially disposed, wherein the backbone is removably attached to the lower receiver; a barrel latch attached to the backbone; a barrel configured to disengage from the backbone when the barrel latch is pushed; and a trigger block assembly configured to drop into the lower receiver.
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3. A device comprising:
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a bolt carrier for a firearm; a backbone configured to at least partially guide the bolt carrier as the bolt carrier moves forward and backward during a firing cycle of the firearm; and wherein the bolt carrier is not completely contained within the backbone. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A firearm comprising:
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a backbone disposed within a receiver; a bolt carrier; and wherein movement of the bolt carrier is constrained by the backbone and is not constrained by the receiver.
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11. A method comprising:
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placing a portion of a bolt carrier within a backbone while leaving another portion of the bolt carrier out of the backbone; and wherein the backbone is configured to at least partially guide the bolt carrier as the bolt carrier moves forward and backward during a firing cycle of a firearm.
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12. A method comprising:
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at least partially guiding a bolt carrier with a backbone as the bolt carrier moves forward and backward during a firing cycle of a firearm; and wherein the bolt is not contained within the backbone.
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13. A device comprising:
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a bolt carrier for a firearm, the bolt carrier having a generally tubular upper portion, a generally rectangular lower portion, and a waist interconnecting the upper portion and the lower portion; and wherein the upper portion is substantially longer than the lower portion. - View Dependent Claims (14, 15, 16)
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17. A method comprising:
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forming a bolt carrier for a firearm to have a generally tubular upper portion, a generally rectangular lower portion, and a waist interconnecting the upper portion and the lower portion; and wherein the upper portion is substantially longer than the lower portion.
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18. A method comprising:
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chambering a cartridge in a firearm using a bolt carrier having a generally tubular upper portion, a generally rectangular lower portion, and a waist interconnecting the upper portion and the lower portion; and wherein the upper portion is substantially longer than the lower portion.
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Specification