Technical information

Practical A.E.G Upgrade 2006

My gun stopped working in semi-auto mode. What’s wrong?

In fact, experienced airsofter will tell you that firing semi-auto frequently is no

good for the gun. Inside your mechbox there is a switch comprising a movable

block and a stationary block.

When you pull the trigger, the movable block is pushed towards the stationary

block. When the metal plates on the stationary block get in touch with the metal

block on the movable block, an electrical connection is made, thus activating the

motor.

Semi-auto shooting is achieved mechanically (which automatically releases the

movable block back to the original position). Frequent single shot can make the

blocks and the mechanical parts worn away faster than usual. Poorer trigger

response time is one possible consequence when the two metal plates on the

stationary block went further apart due to excessive movement.

Single shot should NOT be exercised frequently especially on the V2

implementation.

On MP5 and some M16 variants the selector plate can easily get worn out with

frequent usage. That can also affect the capability to fire single shots.

Stationary block, with two

metal plates on it.

Movable block, with one

metal block on it.