Category: Electronics

308/Shotgun Firmware Configurations

The MTW-308 is shipped with a the standard MTW Spartan Electronics Control Board with dedicated 308/Shotgun firmware. This firmware includes two configurations: “308 Mode” and “Shotgun Mode.” The MTW-308 is set to “308 Mode” from the factory, but it is possible to change the mode accidentally and enter “Shotgun Mode,” which features additional dwell (a longer release of air) only suitable for shotgun builds. You can tell which configuration your MTW is set to by listening to the sound of the dwell. See the examples below.

308 Mode

Shotgun Mode

The configuration can be toggled between the two modes by holding down the trigger for at least 15 seconds. The MTW may fire or make a small click to let you know the mode has been changed.

NOTE: The MTW may also fire after 5 seconds, indicating the select fire mode has been changed. Continue to hold the trigger until the 15-second mark and the gun fires or clicks. If you desired, you can then set your fire mode as desired by holding down the trigger for 5 seconds. See this article for more information: https://www.wolverineairsoft.com/knowledgebase/mtw-spartan-electronics-for-mtw-spec-fire-modes/

Spartan Electronics for MTW-Spec Fire Modes

MTW Fire Mode Select Demonstration. See the instructions below for AEGs.

The Spartan Electronics board can be cycled through several different fire modes as listed below. To advance to the next fire mode, set your gun to semi mode and hold the trigger. After 5 seconds (MTW version) or 10 seconds (AEG Version), the board will advance to the next setting.

MTW (Hold 5 seconds to change modes)
• Semi / Full Auto (Default in US)
• Semi / 3-Round Burst
• Semi / 2-Round Burst
• Semi / Semi (Default in UK)
• 2-Round Burst / Full Auto

AEG (Hold 10 seconds to change modes)
• Semi / Full Auto (Default in US)
• Semi / 3-Round Burst
• Semi / Semi (Default in UK)


*Boards sold in Germany are locked in
Semi / Semi mode.

Empty Mag Detection Traditional and Simplified Modes

The Spartan Electronics for MTW board will automatically disable firing after the last BB is fired when using a Wolverine Airsoft MTW Magazine. Firing will resume in one of two ways depending on the following settings:

• Traditional (Default): To reset empty mag detection, the user must press the Bolt Catch after loading a new magazine.

• Simplified: The MTW will automatically reset empty mag detection when the magazine is removed without requiring use of the Bolt Catch. We recommend putting the MTW in simplified mode when using standard AEG magazines that do not have empty mag detection.


To change between Traditional and Simplified mode simply place the selector on semi and hold down the trigger and the bolt catch for 5 seconds.