The Perun AB may be a microcontroller-steered MOSFET device with active brake and Li-Po protection which will be turned on or off. This unit is extremely rigid and powerful while providing a compact design that’s easy to figure with in your airsoft gun. The microcontroller guarantees resistance to contact bouncing. Active brake (AB) prevents spring wear over time and double shots in semi mode in airsoft guns with a high rate of fireside . Lastly, the Li-Po protection uses a sound signal to allow you to know that your Li-Po battery is running low, supplying you with enough time to modify out your battery.