Magazine for simulated tetherless pistols with lockback

1. A magazine for a simulated pistol, the magazine comprising:

a mechanical counting mechanism that incrementally advances upon a firing of the simulated pistol, wherein the mechanical counting mechanism includes a ratchet wheel that incrementally rotates upon each firing of the simulated pistol, a dial coupled to the ratchet wheel by a shaft such that the dial rotates with the ratchet wheel, and a pin on the dial;

a lockback plunger; and

a locking shaft configured to removably engage the lockback plunger to hold the lockback plunger within the magazine;

wherein the pin on the dial is configured to engage the locking shaft and draw the locking shaft out of engagement with the lockback plunger when the mechanical counting mechanism reaches a state indicating that all simulated rounds have been fired from the simulated pistol, releasing the lockback plunger.

2. The magazine for a simulated pistol as recited in claim 1 , wherein the mechanical counting mechanism includes a dual pawl counting mechanism.

3. The magazine for a simulated pistol as recited in claim 1 , wherein advancement of the mechanical counting mechanism is driven from the recoil of a slide of the simulated pistol.

4. The magazine for a simulated pistol as recited in claim 3 , further comprising an actuation rod driven directly or indirectly by a ramp in the slide of the simulated pistol to actuate the mechanical counting mechanism.

5. The magazine for a simulated pistol as recited in claim 1 , further comprising a reservoir holding a pressurized propellant that provides energy for operating the simulated pistol.

6. The magazine for a simulated pistol as recited in claim 5 , wherein the reservoir holds carbon dioxide at sufficient pressure to liquefy the carbon dioxide.

7. The magazine for a simulated pistol as recited in claim 5 , wherein the reservoir holds sufficient propellant to fire at least 30 simulated rounds from the simulated pistol.

8. The magazine for a simulated pistol as recited in claim 5 , wherein the reservoir holds sufficient propellant to fire at least 50 simulated rounds from the simulated pistol.

9. A magazine for a simulated pistol, comprising:

a mechanical counting mechanism that incrementally advances upon a firing of the simulated pistol; and

a lockback element that is actuated by the mechanical counting mechanism when the mechanical counting mechanism reaches a state indicating that all simulated rounds have been fired from the simulated pistol;

wherein:

the lockback element is a lockback plunger that is released when the mechanical counting mechanism reaches the state indicating that all simulated rounds have been fired from the simulated pistol;

the magazine further comprises a locking shaft configured to engage the lockback plunger to hold the lockback plunger within the magazine; and

the mechanical counting mechanism further includes a ratchet wheel that incrementally rotates upon each firing of the simulated pistol, a dial coupled to the ratchet wheel by a shaft such that the dial rotates with the ratchet wheel, and a pin on the dial configured to engage the locking shaft and draw the locking shaft out of engagement with the lockback plunger when the counting mechanism reaches the state indicating that all simulated rounds have been fired from the simulated pistol, releasing the lockback plunger.

10. The magazine for a simulated pistol as recited in claim 1 , wherein the mechanical counting mechanism is settable to indicate a number of simulated rounds in the magazine.

11. The magazine for a simulated pistol as recited in claim 10 , wherein the mechanical counting mechanism is settable by rotating the ratchet wheel to a particular rotational position to indicate number of simulated rounds in the magazine.

12. The magazine for a simulated pistol as recited in claim 1 , wherein:

the lockback plunger is positioned to actuate a lockback lever of the simulated pistol when the lockback plunger is released.

13. A simulated weapon, comprising:

a slide;

a magazine;

a mechanical counting mechanism, wherein the mechanical counting mechanism incrementally advances upon a firing of the simulated pistol, and wherein the mechanical counting mechanism includes a ratchet wheel that incrementally rotates upon each firing of the simulated weapon, a dial coupled to the ratchet wheel by a shaft such that the dial rotates with the ratchet wheel, and a pin on the dial;

a lockback plunger; and

a locking shaft configured to removably engage the lockback plunger to hold the lockback plunger within the magazine:

wherein the pin on the dial is configured to engage the locking shaft and draw the locking shaft out of engagement with the lockback plunger when the mechanical counting mechanism reaches a state indicating that all simulated rounds have been fired from the simulated weapon, releasing the lockback plunger to engage the slide of the simulated weapon and cause the slide of the simulated weapon to lock back.

14. The simulated weapon of claim 13 , wherein the simulated weapon is a simulated pistol.

15. The simulated weapon of claim 13 , wherein the simulated weapon is untethered.

16. The simulated weapon of claim 13 , wherein the simulated weapon is made by modifying an actual weapon.

17. The simulated weapon of claim 13 , wherein the mechanical counting mechanism is a dual pawl mechanism actuated by motion of the slide.

18. The magazine for a simulated pistol as recited in claim 1 , wherein the lockback plunger defines a recess into which the locking shaft protrudes to engage the lockback plunger.

19. The magazine for a simulated pistol as recited in claim 9 , wherein the lockback plunger defines a recess into which the locking shaft protrudes to engage the lockback plunger.

20. The simulated weapon of claim 13 , wherein the lockback plunger defines a recess into which the locking shaft protrudes to engage the lockback plunger.