Granted Patent B2

US 12,352,534 · App. 18/130,157 · Granted Jul 8, 2025

Inventor: Jason D. Jackson (Virginia Beach, VA)

Assignee: EPIC MFG LLC

F41G3/2655F41A33/02F41A33/06

Abstract

Claims (81)

1. A method of converting a firearm to fire a simulated round, comprising:

removing a stock bolt carrier assembly and a stock bolt assembly from the firearm, the firearm being an actual firearm configured to use conventional ammunition upon a condition that the stock bolt carrier assembly and the stock bolt assembly are installed in the firearm; and

installing a trainer bolt carrier assembly and a trainer bolt assembly into the firearm, the trainer bolt carrier assembly and the trainer bolt assembly being axially aligned, the trainer bolt assembly defining an interior volume and including an inner core, wherein:

the interior volume is configured to receive a pressurized gas from a trainer magazine prior to actuation of the firearm,

the inner core is positioned within the interior volume at a proximal position,

the inner core is configured to move in a distal direction within the interior volume in response to actuation of the firearm,

the movement of the inner core in the distal direction is configured to release a portion of the pressurized gas from the interior volume into the trainer bolt carrier assembly in a proximal direction, and

the trainer bolt carrier assembly is configured to move in the proximal direction relative to the trainer bolt assembly in response to the portion of the pressurized gas.

2. The method of claim 1 , wherein:

the installing the trainer bolt assembly includes placing a distal end of the trainer bolt assembly into a barrel of the firearm such that a plurality of protrusions of the bolt chamber interface interlock with a plurality of lugs within a barrel of the firearm; and

the interlocking of the plurality of protrusions and the plurality of lugs precludes a rotation of the trainer bolt assembly during an operation of the firearm.

3. The method of claim 1 , wherein:

a distal end of the trainer bolt assembly is coupled to a target hit detection system; and

the installing the trainer bolt assembly includes placing the distal end of the trainer bolt assembly and the target hit detection system into a barrel of the firearm.

4. The method of claim 3 , wherein:

the target hit detection system occludes the barrel of the firearm during the firing of the simulated round.

5. The method of claim 3 , wherein:

the trainer bolt assembly includes a spring member and an actuator pin; and

the actuator pin is configured to depress a switch of the target hit detection system in response to the movement of the inner core in the distal direction.

6. The method of claim 1 , further comprising:

inserting the trainer magazine into the firearm such that a gas connector of the trainer magazine is fluidically coupled to a corresponding gas connector of the trainer bolt assembly, the trainer magazine including a pressurized gas.

7. The method of claim 6 , wherein:

the pressurized gas is compressed air.

8. The method of claim 6 , wherein the trainer magazine is a first trainer magazine, the method further comprising:

removing the first trainer magazine from the firearm on a condition that the pressurized gas within the first trainer magazine is reduced;

inserting a second trainer magazine into the firearm, the second trainer magazine including the pressurized gas; and

pressurizing the interior volume of the trainer bolt assembly with a portion of the pressurized gas from the second trainer magazine.

9. The method of claim 6 , further comprising:

removing the trainer magazine from the firearm on a condition that the pressurized gas within the trainer magazine is reduced; and

re-pressurizing the trainer magazine via an access port.

10. The method of claim 6 , wherein the trainer magazine includes a bolt carrier lock, the method further comprising:

simulating an empty-magazine scenario by extending the bolt carrier lock into the trainer bolt assembly, the extension of the bolt carrier lock into the trainer bolt assembly precluding a distal movement of the trainer bolt assembly.

11. The method of claim 1 , further comprising:

removing the trainer bolt carrier assembly and the trainer bolt assembly from the firearm; and

re-installing the stock bolt carrier assembly and the stock bolt assembly into the firearm such that the firearm is returned to a condition to use conventional ammunition.

12. A method of simulating an operation of a firearm, comprising:

conveying, via a bolt nipple connector, pressurized gas into an interior volume of a bolt assembly, the interior volume being fluidically sealed by at least a balanced core seal member of a balanced core in a proximal position within the interior volume;

moving the balanced core in a distal direction to unseat the balanced core seal member and release pressurized gas from the interior volume of the bolt assembly passed the balanced core seal member in a proximal direction;

conveying the released pressurized gas to a bolt carrier body, the bolt carrier body being axially aligned with the bolt assembly; and

moving the bolt carrier body in the proximal direction in response to a force applied by the released pressurized gas applied to the bolt carrier body, the proximal movement of the bolt carrier body generates a simulated recoil effect.

13. The method of claim 12 , wherein:

the movement of the balanced core in the distal direction is developed in response to an impact of a hammer of the firearm upon actuation of the firearm.

14. The method of claim 12 , wherein:

the bolt assembly includes an actuator pin;

the actuator pin is axially aligned with the balanced core;

the actuator pin is configured to depress a switch of a target detection system in response to the movement of the balanced core in the distal direction; and

the depressing of the switch of the target detection system generates a simulated discharge of the firearm.

15. The method of claim 14 , wherein:

the bolt assembly includes a spring member;

the spring member is compressed by the movement of the balanced core in the distal direction;

the spring member moves the balanced core in the proximal direction following the depressing of the switch of the target detection system;

the movement of the balanced core in the proximal direction seats the balanced core seal member to fluidically seal the interior volume of the bolt assembly; and

the fluidic sealing of the interior volume by the seating of the balanced core seal member places the interior volume in a condition to receive the pressurized gas and generate a subsequent simulated discharge of the firearm.

16. A firearm conversion kit for converting a firearm between a conventional configuration and a training configuration, the firearm conversion kit comprising:

a trainer bolt carrier assembly configured to move in a proximal direction from a home position to simulate a recoil of the firearm; and

a trainer bolt assembly including a bolt body member, a guide member, and a bolt chamber interface, wherein:

the bolt body member is axially aligned with the trainer bolt carrier assembly,

the trainer bolt carrier assembly is slidingly coupled to the bolt body member via the guide member,

the bolt body member is configured to remain in a fixed longitudinal position relative to a barrel of the firearm during a simulated firing of the firearm and a simulated chambering of a cartridge,

the bolt chamber interface is defined by a distal end portion of the bolt body member,

the bolt chamber interface includes a plurality of protrusions position to interlock with a plurality of lugs within the barrel, and

the interlocking of the plurality of protrusions and the plurality of lugs precludes a rotation of the trainer bolt assembly during the simulated firing and the simulated chambering of the cartridge.

17. The firearm conversion kit of claim 16 , wherein:

the trainer bolt assembly includes a bolt nipple connector for mating with a nipple assembly of a magazine assembly;

the magazine assembly contains a pressurized gas; and

the magazine assembly is configured to be removed and replaced on a condition that the pressurized gas within the magazine assembly is depleted.

18. The firearm conversion kit of claim 17 , wherein:

the bolt body member defines an interior volume;

the interior volume is configured to receive the pressurized gas from the magazine assembly prior to actuation of the firearm;

the trainer bolt assembly includes a balanced core positioned within the interior volume at a proximal position;

the balanced core is configured to move in a distal direction within the interior volume toward a distal position in response to an impact of a hammer of the firearm; and

the movement of the balanced core in the distal direction is configured to release a portion of the pressurized gas from the interior volume into the trainer bolt carrier assembly in a proximal direction to generate the movement of the trainer bolt carrier assembly in the proximal direction.

19. The firearm conversion kit of claim 18 , wherein:

the firearm conversion kit includes a target detection system coupled to the distal end portion of the bolt body member;

the trainer bolt assembly includes an actuator pin;

the actuator pin is axially aligned with the balanced core; and

the actuator pin is configured to actuate the target detection system to generate a simulated discharge of the firearm in response to the movement of the balanced core in the distal direction.

20. The firearm conversion kit of claim 19 , wherein:

the trainer bolt assembly includes a spring member;

the spring member is positioned to bias the balanced core in the proximal direction; and

the spring member is configured to position a balanced core seal of the balanced core following the actuation of the target detection system such that the interior volume of the trainer bolt assembly is fluidically sealed to receive the pressurized gas in preparation for a subsequent simulated discharge of the firearm.

Assignments (1)

Continuity (3)

References Cited (22)