Importance

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Abstract

Firearms with improved systems and methods of attaching the barrels that can provide for quicker and easier replacement of the barrel. In particular embodiments, the attachment mechanism includes a door that opens to release the barrel from the receiver. In certain embodiments, the door is located on the firearm below the barrel, a latch releasably holds the door closed, the door is pivotably attached to the receiver at a first end of the door, the latch is at a second end of the door, the door includes a barrel clamp that contacts a flange at a rearward end of the barrel to secure the barrel to the receiver, a rotating cam in the door secures the barrel to the receiver, the barrel attaches to the receiver without screwing the barrel into the receiver and without screwing an attachment component onto threads on the receiver, or a combination thereof.

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First Claim