Category: MTW Shotgun

Covers topics specific to the Genesis Arms Gen-12 MTW Shotgun.

BLINC / HAVOC HPA Engine Compatibility

Some features of the BLINC are not compatible with the HAVOC HPA Engine included in the Gen-12 MTW Shotgun including the built-in chronograph, random sampling, and dwell autotune. Additionally, dwell tuning is currently only available via the Wolverine Airsoft app. Check out this video for more information.

Invictus M-LOK Rail for Gen-12 Installation

Invictus MLok Rail for Gen-12 MTW Shotgun on White

Install the bushing into the end of the barrel. Don’t tighten it all the way until the gun is fully assembled.

Remove your existing rail by using a 1/8″ hex key to remove the hop adjustment screw and 8 retention screws. Refer to the Owner’s Manual or Disassembly Guide Video for detailed instructions. Be sure not to lose your hop nub when removing the rail.

You can re-use the hop-adjustment spring and detent from your existing rail or use the spring and detent that came with your new rail. The spring should be cut a length of approximately 1/2″ (13mm) if it hasn’t been already. The spring is installed first, followed by the detent.

Install spring first, then detent into hole in end of rail.
Half of detent should be visible when installed.

Slide your new rail onto the Gen-12 and reinstall the hop nub (oriented vertically) and hop adjustment screw. Ensure the hop adjustment is engaging the spring and detent and clicking when turned. Secure the rail with the 8 retention screws using a 1/8” hex key. Fully tighten the bushing.

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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FeatureMTW-M4 (Billet, Forged)MTW-9MTW-308MTW-ShotgunMTW AKArticle Series
Barrel (Inner)AEGAEGAEGAEGAEGAEG
Barrel (Outer)MTWMTWMTWMTW Gen-12LCTMTW
Body PinsReal Steel M4Real Steel M4Real Steel 308Real Steel 308N/AReal Steel M4
Bolt CatchMTWMTWMTWMTWN/AMTW
BuckingAEGAEGAEGMTW Gen-12AEGAEG
Buffer TubeReal SteelReal SteelReal SteelReal SteelReal SteelReal Steel
Charging HandleReal Steel with modificationReal Steel with modificationReal Steel with modificationMTW Gen-12MTW AKN/A
Contact Yoke MTWMTWMTWMTWN/AMTW
Dust CoverReal Steel M4Real Steel M4Real Steel 308N/AReal Steel AKN/A
ElectronicsMTWMTWMTWMTWMTW AKMTW
EnginesINFERNO/REAPERINFERNO/REAPERINFERNOHAVOCINFERNO/REAPERINFERNO/REAPER
Feed Tube1MTW M4MTW-9MTW-308MTW M4MTW AKMTW M4
Flash Hider14mm negative14mm negative14mm negativeMTW Gen-1224mm negative14mm negative
Grips2Real Steel M4Real Steel M4Real Steel M4Real Steel M4Real Steel AKReal Steel M4
Hop up MTWMTWMTWMTW Gen-12MTWMTW
MagazinesMTW/AEG (M4)ASG EVOMTW/AEG (SR25/308)MTW/AEG (SR25/308)AEG AKMTW/AEG (M4)
Rail/ Handguard3AEGAEGAEGMTW Gen-12LCT AK HandguardsAEG
Receiver (Lower)MTW M4MTW-9MTW-308MTW-308N/AMTW M4 
Receiver (Upper)MTW-M4MTW-M4MTW-308MTW Gen-12N/AMTW-M4
Selector Switch MTWMTWMTWMTWLCT AKMTW
Springs, Pins and DetentsReal Steel M4Real Steel M4Real Steel M4Real Steel M4N/AReal Steel M4
Triggers MTWMTWMTWMTWMTW AKMTW
WRAITH Stocks MTWMTWMTWMTWMTWMTW
  1. Three generations of feed tube exist. For more details, see this article. ↩︎
  2. If storing battery in or running air line through grip, modification is needed. See video. ↩︎
  3. MTW barrel nut only compatible with MTW rails. Most AEG rails and Real Steel barrel nuts are compatible. ↩︎

308/Shotgun Firmware Configurations on Spartan Electronics

MTW-308s and MTW Shotgun shipped with a standard MTW Spartan Electronics Control Board included dedicated 308/Shotgun firmware. This firmware includes two configurations: “308 Mode” and “Shotgun Mode.”

These modes should be set correctly from the factory, but it is possible to change the mode accidentally to the incorrect mode for your build.

Shotgun Mode 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/