Shotgun conversion method and apparatus
First Claim
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1. A shotgun comprising:
- a receivera trigger, and safety attached to the receiver;
a barrel attached to the receiver;
a surface defining a gas port in the barrel;
wherein the gas port is aligned with a surface defining a vent passage in an upper gas block component of a gas block assembly;
wherein the vent passage extends into an inner chamber of the upper gas block;
the upper gas block fixed to the barrel by way of a lower gas block;
the lower gas block removably attached to the upper gas block;
wherein inner surfaces of the lower gas block and upper gas block clamp around the outer surface of the barrel thus positioning the vent passage in fluid connection with the gas port;
wherein a rearward end of the upper gas block is attached to a gas tube;
the gas tube having an opposing longitudinal end inserted into a female surface of the upper receiver;
a piston comprising a rod component and a sealing component positioned within the upper gas block;
a gas cap positioned within the upper gas block wherein a radially outer surface of the gas cap threads into a female threaded surface of the upper gas block such that rotation of the gas cap will result in longitudinal movement of a gas plug;
the gas plug comprises an angled surface adjacent the vent passage;
the gas plug comprising a portion configured so that the gas plug does not rotate when the gas cap is rotated; and
as the gas cap is rotated, the cap and gas plug reposition longitudinally forward and rearward relative to the upper gas block thus adjusting the volume and pressure of air passing through the vent passage upon the face of the piston.
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Abstract
Disclosed herein are modifications to a firearm of the assault (tactical) weapon style which allow those familiar with these sorts of rifles, especially the AR-15, and AR-15 variant rifles, to rapidly gain comfort and precision with a shotgun of the semi-automatic or potentially automatic feed mechanism in that the disclosed shotgun is externally the same and substantially identical externally to the assault weapon to which they are already familiar. In particular, the disclosed shotgun has a receiver, pistol style grip, hand guard, magazine receiver, and stock adapter which is substantially identical to an AR-15 or AAR-15 variant rifle to which they are already accustomed.
70 Citations
10 Claims
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1. A shotgun comprising:
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a receiver a trigger, and safety attached to the receiver; a barrel attached to the receiver; a surface defining a gas port in the barrel; wherein the gas port is aligned with a surface defining a vent passage in an upper gas block component of a gas block assembly; wherein the vent passage extends into an inner chamber of the upper gas block; the upper gas block fixed to the barrel by way of a lower gas block; the lower gas block removably attached to the upper gas block; wherein inner surfaces of the lower gas block and upper gas block clamp around the outer surface of the barrel thus positioning the vent passage in fluid connection with the gas port; wherein a rearward end of the upper gas block is attached to a gas tube; the gas tube having an opposing longitudinal end inserted into a female surface of the upper receiver; a piston comprising a rod component and a sealing component positioned within the upper gas block; a gas cap positioned within the upper gas block wherein a radially outer surface of the gas cap threads into a female threaded surface of the upper gas block such that rotation of the gas cap will result in longitudinal movement of a gas plug; the gas plug comprises an angled surface adjacent the vent passage; the gas plug comprising a portion configured so that the gas plug does not rotate when the gas cap is rotated; and as the gas cap is rotated, the cap and gas plug reposition longitudinally forward and rearward relative to the upper gas block thus adjusting the volume and pressure of air passing through the vent passage upon the face of the piston. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification