Category: MTW Shotgun / HAVOC
Covers topics specific to the Genesis Arms Gen-12 MTW Shotgun and HAVOC HPA Engine.
Quickstart Guide for Gen-12 MTW Shotgun
Getting Started with the Gen-12 MTW Shotgun
Bucking Replacement for the Gen-12 MTW Shotgun
Owner’s Manual for Gen-12 MTW Shotgun
MTW Compatibility Guide
The MTW is designed to be a modular platform with highly interchangeable parts within the MTW-Spec family, with real steel firearms, and with AEGs when possible. The chart below can help you answer compatibility questions among different components and MTW series.
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Feature | MTW-M4 (Billet, Forged) | MTW-9 | MTW-308 | MTW-Shotgun | Article Series |
---|---|---|---|---|---|
Barrel (Inner) | AEG | AEG | AEG | AEG | AEG |
Barrel (Outer) | MTW | MTW | MTW | MTW Gen-12 | MTW |
Body Pins | Real Steel M4 | Real Steel M4 | Real Steel 308 | Real Steel 308 | Real Steel M4 |
Bolt Catch | MTW | MTW | MTW | MTW | MTW |
Bucking | AEG | AEG | AEG | MTW Gen-12 | AEG |
Buffer Tube | Real Steel | Real Steel | Real Steel | Real Steel | Real Steel |
Charging Handle | Real Steel with modification | Real Steel with modification | Real Steel with modification | MTW Gen-12 | N/A |
Contact Yoke | MTW | MTW | MTW | MTW | MTW |
Electronics | MTW | MTW | MTW | MTW | MTW |
Engines | INFERNO/REAPER | INFERNO/REAPER | INFERNO | HAVOC | INFERNO/REAPER |
Feed Tube1 | MTW M4 | MTW-9 | MTW-308 | MTW M4 | MTW M4 |
Flash Hider | 14mm CCW | 14mm CCW | 14mm CCW | MTW Gen-12 | 14mm CCW |
Grips2 | Real Steel | Real Steel | Real Steel | Real Steel | Real Steel |
Hop up | MTW | MTW | MTW | MTW Gen-12 | MTW |
Magazines | MTW/AEG (M4) | ASG EVO | MTW/AEG (SR25/308) | MTW/AEG (SR25/308) | MTW/AEG (M4) |
Rails3 | AEG | AEG | AEG | MTW Gen-12 | AEG |
Receiver (Lower) | MTW M4 | MTW-9 | MTW-308 | MTW-308 | MTW M4 |
Receiver (Upper) | MTW-M4 | MTW-M4 | MTW-308 | MTW Gen-12 | MTW-M4 |
Selector Switch | MTW | MTW | MTW | MTW | MTW |
Springs, Pins and Detents | Real Steel M4 | Real Steel M4 | Real Steel M4 | Real Steel M4 | Real Steel M4 |
Triggers | MTW | MTW | MTW | MTW | MTW |
WRAITH Stocks | MTW | MTW | MTW | MTW | MTW |
- Three generations of feed tube exist. For more details, see this article. ↩︎
- If storing battery in or running air line through grip, modification is needed. See video. ↩︎
- MTW barrel nut only compatible with MTW rails. Most AEG rails and Real Steel barrel nuts are compatible. ↩︎
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/