A firearm malfunction training device and method include a blank malfunction round that simulates a T3 malfunction and allows a realistic clearing protocol during the training. The malfunction round size and shape generally mimic the corresponding live round, so that malfunction round moves like the
A firearm malfunction training device and method include a blank malfunction round that simulates a T3 malfunction and allows a realistic clearing protocol during the training. The malfunction round size and shape generally mimic the corresponding live round, so that malfunction round moves like the live round through the magazine. However, the malfunction round has a front end/portion that is oversized in diameter and does not fit properly or fully through the firearm breech, to jam the firearm loading mechanism at the breech. Preferably, the malfunction round also has a conical rear region radially-undersized relative to the live round casing, whereby the malfunction round leaves the magazine when the magazine is stripped from the firearm to start the clearing protocol. The enlarged front end and undersized rear region effectively simulate, and provide a realistic protocol for identifying, clearing and, correcting, a T3 malfunction.
대표청구항▼
1. A combination of a semi-automatic firearm having a magazine with an internal diameter, a chamber, and a breech opening into the chamber, the breech opening having a breech diameter, and a blank malfunction round for use in training in the firearm, wherein the malfunction round is configured to be
1. A combination of a semi-automatic firearm having a magazine with an internal diameter, a chamber, and a breech opening into the chamber, the breech opening having a breech diameter, and a blank malfunction round for use in training in the firearm, wherein the malfunction round is configured to be operative in the magazine, and the malfunction round is configured to be inoperative in the breech opening, by the malfunction round comprising a front end portion having a diameter larger than said breech diameter, so that the malfunction round abuts into one or more surfaces of the breech opening, but does not fully pass through the breech opening into the chamber. 2. The combination of claim 1, wherein said front end portion is cylindrical and has a generally flat, radial front surface. 3. The combination of claim 1, wherein the front end comprises multiple radially-extending protrusions and recessed surfaces between the protrusions, wherein the diameter of said front end at the protrusions is larger than said breech diameter and the diameter of said front end at the recessed surfaces between the protrusions is smaller than said breech diameter. 4. The combination of claim 3, wherein the multiple radially-extending protrusions comprise only two protrusions 180 degrees apart. 5. The combination of claim 4, wherein the recessed surfaces between the protrusions are flat and are 180 degrees apart. 6. The combination of claim 4, wherein the recessed surfaces between the protrusions are elliptical and are 180 degrees apart. 7. The combination of claim 1, wherein the diameter of the front end is at least 0.005 inches greater than the breech diameter. 8. The combination of claim 1, wherein the diameter of the front end is at least 0.01 inches greater than the breech diameter. 9. The combination of claim 1, wherein the diameter of the front end is 0.01 up to 0.02 inches greater than the breech diameter. 10. The combination of claim 3, wherein the diameter of the front end at the protrusions is at least 0.005 inches greater than the breech diameter. 11. The combination of claim 3, wherein the diameter of the front end at the protrusions is at least 0.01 inches greater than the breech diameter. 12. The combination of claim 3, wherein the diameter of the front end at the protrusions is 0.01 up to 0.02 inches greater than the breech diameter. 13. The combination of claim 1, wherein the malfunction round has a longitudinal axis and a length between the front portion and a rearmost base, a main portion rearward of the front portion, and a conical portion between the main portion and the base that extends axially in a range of 15-30 degrees to the longitudinal axis of the malfunction round. 14. A combination of a semi-automatic firearm having a magazine with an internal diameter, a chamber, and a breech opening into the chamber, the breech opening having a breech diameter, and a blank malfunction round for use in training in the firearm, wherein the malfunction round is configured to be operative in the magazine, and the malfunction round is configured to be inoperative in the breech opening, by the malfunction round comprising a front end portion having a diameter larger than said breech diameter, so that the malfunction round abuts into one or more surfaces of the breech opening, but does not fully pass through the breech opening into the chamber; wherein the malfunction round has a longitudinal axis and a length between the front portion and a rearmost base, a main portion rearward of the front portion, and a conical portion between the main portion and the base that extends axially in a range of 15-30 degrees to the longitudinal axis of the malfunction round; and wherein the conical portion extends along 15-30 percent of the length of the malfunction round, so that the malfunction round separates from the magazine when the magazine is stripped from the firearm after a simulated breech jam. 15. The malfunction round of claim 1, wherein the front end diameter is the largest diameter of any portion of the malfunction round. 16. The malfunction round of claim 3, wherein the diameter at the protrusions is the largest diameter of any portion of the malfunction round. 17. A blank malfunction round for use in a firearm with a breech opening and a magazine, for training a user to handle a breech jam malfunction of the firearm, the malfunction round having a front end, a rear base, a longitudinal axis and a length between the front end and the base, a main portion rearward of the front portion, and a conical portion between the main portion and the base, wherein the front end has a maximum diameter that is enlarged in diameter compared to all of the base, main portion, and the conical portion, so that the front end jams in the breech opening, and wherein the conical portion extends axially along 15-30 percent of the length of the malfunction round, at 15-30 degrees to the longitudinal axis of the malfunction round, so that the malfunction round separates from the magazine upon stripping of the magazine from the firearm. 18. The malfunction round of claim 17, wherein the front end comprises multiple radially-extending protrusions and multiple recessed surfaces between the protrusions, wherein said front end maximum diameter extends through at least one of the protrusions. 19. The malfunction round of claim 17, wherein the front end comprises two radially-extending protrusions at 180 degrees apart, and recessed surfaces between the protrusions, wherein said front end maximum diameter extends through the protrusions. 20. The malfunction round of claim 19, wherein the recessed surfaces are selected from the group consisting of: flat surfaces, planar surfaces, elliptical surfaces, and curved surfaces. 21. The malfunction round of claim 17, wherein the base comprises a circumferential groove near the conical portion so that the malfunction round moves smoothly through the magazine of the firearm.
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이 특허에 인용된 특허 (3)
Stimmell James S. ; Todd Marshall F., Dummy ammunition round method and apparatus.
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