Pneumatic system and method for simulated firearm training

A training device simulating selected functionality of a firearm, the device comprising:

• parts of a firearm, the parts comprising (1) a frame comprising a trigger assembly and a magazine well and (2) a bolt selectively cycling with respect to the frame;
• a magazine assembly secured within the magazine well;
• the magazine assembly having a counter comprising a rocker (1) positioned so as to be contacted by the bolt during the cycling and (2) mounted so as to pivot from a first position to a second position and back to the first position with each cycle of the cycling;
• the magazine assembly wherein the counter further comprises a toothed wheel positioned and rotatably mounted proximate the rocker such that pivoting of the rocker from the first position to the second position and back to the first position induces one increment of rotation of the toothed wheel;
• and
• the magazine assembly wherein the counter further comprises a lock that is released after a particular number of increments of rotation have been induced in the toothed wheel, the lock, while released, preventing the training device from returning to a ready-to-fire condition.