What is the correct sequence for the firing pin protrusion test on the M203 grenade launcher?

The correct sequence for the firing pin protrusion test on the M203 grenade launcher involves a precise set of actions to ensure safety and functionality. This includes preparing the weapon, checking the firing mechanism, and verifying that the firing pin is protruding adequately for reliable ignition of the grenades.

The first step is to cock the weapon, which prepares the firing mechanism for the test. Moving the barrel forward is crucial as it aligns the firing mechanism for the test. Removing the screw is necessary for accessing the firing pin and allowing for an accurate measurement of its protrusion. Finally, squeezing the trigger enables the actual test of the firing pin's protrusion. This sequence is vital for ensuring that the weapon operates correctly and safely.

Other sequences may not provide the necessary steps to effectively test the firing pin. For example, options involving loading or firing the weapon could compromise safety, while others that suggest adjusting or checking without detailing the correct progression of steps may not ensure a proper evaluation of the firing pin. The identified sequence ensures that each step builds on the previous one to maintain safety and reliability during the test.