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;
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; and
at least 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; and
/ora 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.
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.
110 Citations
22 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; 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; and at least 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; and
/ora 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. - View Dependent Claims (2, 3)
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4. 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 having a barrel extension and a cross pin; a swinging wedge configured to engage the cross pin on the barrel to pull the barrel upward into a plurality of v-blocks on the backbone and to pull a flange on the barrel extension upward into a groove in the backbone to center the barrel and lock the barrel extension from fore and aft motion in relation to the backbone; and a trigger block assembly configured to drop into the lower receiver. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A firearm comprising:
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a backbone disposed within a receiver and having a slot formed therein; a barrel having a barrel extension and a cross pin; and a swinging wedge configured to engage the cross pin on the barrel to pull the barrel upward into a plurality of v-blocks on the backbone and to pull a flange on the barrel extension upward into a groove in the backbone to center the barrel and lock the barrel extension from fore and aft motion in relation to the backbone. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification