Abstract: A locked breech rotating bolt pistol caliber operating system for use with a semi-automatic or fully automatic firearms is described that is retro fit capable and is compatible with many existing AR15 type lower receivers that utilize pistol caliber magazines. The operating system includes an upper receiver that includes a fixed ejector to eject spent casings to minimize the likelihood that the firearm will jam.

Abstract: A locked breech rotating bolt pistol caliber operating system for use with a semi-automatic or fully automatic firearms is described that is retro fit capable and is compatible with many existing AR15 type lower receivers that utilize pistol caliber magazines. The operating system includes an upper receiver that includes a fixed ejector to eject spent casings to minimize the likelihood that the firearm will jam.

Abstract: A multi use retro fit capable adjustable gas block designed to interface with an autoloading gas operated firearm is provided to replace existing gas blocks. The adjustable gas block optimizes gas flow into the host firearms operating system. The adjustable gas block has a spring loaded adjustment knob that releases when pulled forward allowing it to rotate. By rotating the adjustment knob the gas flow is increased or decreased based on one of four provided gas settings. Setting one is optimal for using a silencer, setting two is optimal for normal operations, setting three is optimal for adverse conditions, and setting four either turns the gas flow off optimizing sound reduction and providing for manual operation, or provides an extra high gas setting for the host firearm. The system works by precisely metering gas entering the operating system and not by exhausting excess gas into the atmosphere.

Abstract: The present application is directed to a firearm including an action spring and a buffer assembly including a buffer body defining a counterweight bore having a first length and a counterweight received within the counterweight bore. The buffer body has a first end defining a face and a second end. The counterweight has a second length less than the first length. A buffer bumper is supported on the second end of the buffer body and a buffer pad is positioned within the counterweight bore between the counterweight and the first end of the buffer body. A bolt carrier is positioned to engage the face of the buffer body. An action spring is positioned about the buffer body and extends between the receiver extension of the firearm and the buffer body.

Abstract: The present application is directed to a firearm including an action spring and a buffer assembly including a buffer body defining a counterweight bore having a first length and a counterweight received within the counterweight bore. The buffer body has a first end defining a face and a second end. The counterweight has a second length less than the first length. A buffer bumper is supported on the second end of the buffer body and a buffer pad is positioned within the counterweight bore between the counterweight and the first end of the buffer body. A bolt carrier is positioned to engage the face of the buffer body. An action spring is positioned about the buffer body and extends between the receiver extension of the firearm and the buffer body.

Abstract: A retro fit capable super & subsonic gas regulator assembly designed to interface with an auto-loading gas operated host firearm is provided to replace existing gas systems. The gas regulator assembly optimizes gas flow into the host firearm's operating system. The gas regulator has a spring actuated gas regulator and cross-pin including a flat that disengages with the gas regulator when the gas regulator is rotated to allow the gas flow to be set to one of a plurality of gas settings e.g., four. In embodiments, setting one is optimal for using supersonic ammunition with a silencer, setting two is optimal for using supersonic ammunition without a silencer, setting three is optimal for subsonic ammunition, and setting four turns the gas flow off optimizing sound reduction and providing for manual operation of the host firearm. The system works by precisely metering gas entering the operating system and not by exhausting excess gas into the atmosphere.

Abstract: A multi use retro fit capable adjustable gas block designed to interface with an autoloading gas operated firearm is provided to replace existing gas blocks. The adjustable gas block optimizes gas flow into the host firearms operating system. The adjustable gas block has a spring loaded adjustment knob that releases when pulled forward allowing it to rotate. By rotating the adjustment knob the gas flow is increased or decreased based on one of four provided gas settings. Setting one is optimal for using a silencer, setting two is optimal for normal operations, setting three is optimal for adverse conditions, and setting four either turns the gas flow off optimizing sound reduction and providing for manual operation, or provides an extra high gas setting for the host firearm. The system works by precisely metering gas entering the operating system and not by exhausting excess gas into the atmosphere.

Abstract: A retro fit capable super & subsonic gas regulator assembly designed to interface with an auto-loading gas operated host firearm is provided to replace existing gas systems. The gas regulator assembly optimizes gas flow into the host firearm's operating system. The gas regulator has a spring actuated gas regulator and cross-pin including a flat that disengages with the gas regulator when the gas regulator is rotated to allow the gas flow to be set to one of a plurality of gas settings e.g., four. In embodiments, setting one is optimal for using supersonic ammunition with a silencer, setting two is optimal for using supersonic ammunition without a silencer, setting three is optimal for subsonic ammunition, and setting four turns the gas flow off optimizing sound reduction and providing for manual operation of the host firearm. The system works by precisely metering gas entering the operating system and not by exhausting excess gas into the atmosphere.

Abstract: A convertible gas piston conversion system for the AR-15, AR-10, or their variant rifle platforms is provided to convert the platform from a direct impingement gas system to a piston driven operating system. The conversion system includes a gas block having a barrel bore and two piston cylinder bores one on either side of the gas block. One of the piston cylinder bores is for utilization of the AR-15 rifle and the other of the piston cylinder bores is for utilization of the AR-10 rifle, making this piston system convertible for either the AR-15, AR-10, or any of their variant rifle platforms. A piston cylinder is inserted into the gas block via the piston cylinder bore and a piston is actuated inside the piston cylinder to cycle the rifle. A connecting link is coupled between the piston and an op-rod making the gas systems length adjustable by simply replacing the connecting link.

Abstract: A multi use retro fit capable adjustable gas block designed to interface with an autoloading gas operated firearm is provided to replace existing gas blocks. The adjustable gas block optimizes gas flow into the host firearms operating system. The adjustable gas block has a spring loaded adjustment knob that releases when pulled forward allowing it to rotate. By rotating the adjustment knob the gas flow is increased or decreased based on one of four provided gas settings. Setting one is optimal for using a silencer, setting two is optimal for normal operations, setting three is optimal for adverse conditions, and setting four either turns the gas flow off optimizing sound reduction and providing for manual operation, or provides an extra high gas setting for the host firearm. The system works by precisely metering gas entering the operating system and not by exhausting excess gas into the atmosphere.

Abstract: A multi use retro fit capable adjustable gas block designed to interface with an autoloading gas operated firearm is provided to replace existing gas blocks. The adjustable gas block optimizes gas flow into the host firearms operating system. The adjustable gas block has a spring loaded adjustment knob that releases when pulled forward allowing it to rotate. By rotating the adjustment knob the gas flow is increased or decreased based on one of four provided gas settings. Setting one is optimal for using a silencer, setting two is optimal for normal operations, setting three is optimal for adverse conditions, and setting four either turns the gas flow off optimizing sound reduction and providing for manual operation, or provides an extra high gas setting for the host firearm. The system works by precisely metering gas entering the operating system and not by exhausting excess gas into the atmosphere.

Abstract: A convertible gas piston conversion system for the AR-15, AR-10, or their variant rifle platforms is provided to convert the platform from a direct impingement gas system to a piston driven operating system. The conversion system includes a gas block having a barrel bore and two piston cylinder bores one on either side of the gas block. One of the piston cylinder bores is for utilization of the AR-15 rifle and the other of the piston cylinder bores is for utilization of the AR-10 rifle, making this piston system convertible for either the AR-15, AR-10, or any of their variant rifle platforms. A piston cylinder is inserted into the gas block via the piston cylinder bore and a piston is actuated inside the piston cylinder to cycle the rifle. A connecting link is coupled between the piston and an op-rod making the gas systems length adjustable by simply replacing the connecting link.