LAW ENFORCEMENT CARBINE WITH ONE PIECE RECEIVER
First Claim
1. An indirect gas operating system for an automatic or semi-automatic firearm, the indirect gas operating system comprising:
- a gas block having a cylinder, the gas block fitted to a barrel assembly having a bore, the cylinder in communication with the bore;
a piston having a piston end and a striking end, the piston end fitted to the cylinder; and
a bolt assembly having a striking surface;
wherein, when a cartridge is fired, gas displaces the piston end and causes the striking end to strike the striking surface displacing the bolt assembly, and wherein, the cylinder and the piston are together removable as an assembly from the firearm without removal of the gas block.
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0 Petitions
Accused Products
Abstract
An indirect gas operating system for an M4 type automatic or semi-automatic firearm. The indirect gas operating system has a gas block having a cylinder. The gas block is fitted to a barrel assembly having a bore with the cylinder in communication with the bore. A piston having a piston end and a striking end has the piston end fitted to the cylinder. A bolt assembly having a striking surface is provided. When a cartridge is fired, gas displaces the piston end and causes the striking end to strike the striking surface displacing the bolt assembly. The cylinder and the piston are together removable as an assembly from the firearm without removal of the gas block.
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Citations
29 Claims
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1. An indirect gas operating system for an automatic or semi-automatic firearm, the indirect gas operating system comprising:
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a gas block having a cylinder, the gas block fitted to a barrel assembly having a bore, the cylinder in communication with the bore;
a piston having a piston end and a striking end, the piston end fitted to the cylinder; and
a bolt assembly having a striking surface;
wherein, when a cartridge is fired, gas displaces the piston end and causes the striking end to strike the striking surface displacing the bolt assembly, and wherein, the cylinder and the piston are together removable as an assembly from the firearm without removal of the gas block. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semi-automatic or automatic rifle comprising:
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a receiver having an integral hand guard portion;
a barrel having a bore, the bore removably connected to the receiver, the hand guard portion extending over and surrounding the barrel;
an indirect gas operating system having a gas block and a piston;
the gas block having a cylinder, the gas block fitted to the barrel, the cylinder in communication with the bore;
a piston having a piston end and a striking end, the piston end fitted to the cylinder; and
a bolt carrier having a striking surface;
wherein, when a cartridge is fired, gas displaces the piston end and causes the striking end to strike the striking surface displacing the bolt assembly, and wherein, the cylinder and the piston are together removable as an assembly from the firearm without removal of the gas block. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A semi-automatic or automatic rifle comprising:
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a receiver having an integral hand guard portion;
a barrel removably connected to the receiver, the hand guard portion extending over and surrounding the barrel;
a removable accessory device mounting rail removably connected to the receiver and having another hand guard portion mateable with the integral hand guard portion of the receiver; and
a quick release lock mounted to at least one of the removable mounting rail or the receiver for locking the removable mounting rail to the receiver;
wherein the quick release lock has a movable locking member movable between a locked and unlocked positions, wherein when in the locked position the locking member locks the removable mounting rail in an installed position to the receiver, and when the locking member is in the unlocked position, the mounting rail is unlocked and freely movable relative to the receiver, wherein the locking member has an angled engagement portion protruding from the removable mounting rail and engaging a corresponding angled recess in the receiver, wherein the locking member acts as a wedge in the recess with the removable accessory device mounting rail preloaded with a biasing force against the integral hand guard portion. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A modular automatic or semi automatic firearm comprising:
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an upper receiver assembly having a bolt, a barrel and an integral hand guard, the integral hand guard extending over the barrel and having venting features for allowing cooling air to pass there through; and
a lower receiver assembly connected to the upper receiver assembly and having a fire control assembly;
wherein, the lower receiver assembly is removably and interlockingly secured to the upper receiver assembly, wherein the lower receiver is selectable from different interchangeable lower receivers each having different characteristics and each having a common interface to the upper receiver. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification