Method and apparatus for converting an AR pattern rifle firearm into a bullpup configuration
OwnerRyan Douvierinventor
Life of this patent
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Abstract
A method for disassembling and converting a traditional AR-pattern firearm into a bullpup configuration of a semi-automatic rifle firearm assembly includes releasing and removing at least a firearm but stock and a standard bolt carrier group from the rifle firearm and then replacing the removed components with elements from a bullpup kit, namely a bullpup bolt carrier group that includes a bolt carrier and a spring assembly, the spring assembly having compression spring that is loaded when the bolt carrier recoils.
Claims18
A bullpup conversion kit for converting an AR pattern rifle of a type that includes a body member having standard trigger, a bolt carrier with a buffer tube mounted atop the body member, a standard shoulder stock coupled rearwardly to the body member, and a barrel assembly extending operatively forwardly from the bolt carrier, into a bullpup firearm, said bullpup conversion kit comprising:
- a lower receiver coupled to a front portion of the body member, said lower receiver having a bullpup trigger situated forwardly from the standard trigger and an upper surface supporting the barrel assembly;
- a bufferless bolt carrier assembly mounted atop the body member in replacement of the bolt carrier of the rifle, said bufferless bolt carrier assembly including a bolt carrier and a spring assembly mounted in a bufferless space rearwardly of and in communication with said bolt carrier;
- a trigger linkage coupled at one end to the bullpup trigger and coupled at another end to the standard trigger such that actuation of the bullpup trigger actuates the standard trigger via the trigger linkage;
- a buffer plug having a ring-shaped configuration and coupled to the lower receiver rearward of said bolt carrier;
- and
- a compression spring including a distal end seated in said buffer plug and extending forwardly to a proximal end adjacent a rear end of said bolt carrier of said bufferless bolt carrier assembly.
A method for converting an AR pattern rifle into a bullpup firearm using a bullpup conversion kit, said method for converting comprising:
- removing a standard shoulder stock and a standard bolt carrier group from a body member of the rifle firearm;
- mounting a lower receiver to a front portion of the body member, said lower receiver having a bullpup trigger situated forwardly from a standard trigger associated with the rifle firearm and having an upper surface supporting a barrel assembly associated with the rifle firearm;
- mounting a bufferless bolt carrier assembly atop the body member in replacement of the bolt carrier group of the rifle firearm, said bufferless bolt carrier assembly including a bolt carrier and a spring assembly mounted in a buffferless space rearwardly of and in communication with said bolt carrier;
- mounting a trigger linkage at one end to the bullpup trigger and at another end to the standard trigger such that actuation of the bullpup trigger actuates the standard trigger via the trigger linkage;
- wherein said spring assembly includes:
- a buffer plug having a ring-shaped configuration and coupled to the body member rearward of said bolt carrier;
- a compression spring having a unitary configuration and that includes a distal end seated in said buffer plug and extending forwardly to a proximal end adjacent a rear end of said bolt carrier of said bufferless bolt carrier assembly.
Dependencies are inferred from the claim text.