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Product details

Genesis Arms Gen-12 MTW SBS Shotgun

The Gen-12 MTW SBS Shotgun delivers full-size shotgun power in a compact, CQB-ready profile. Built on the MTW platform with a licensed Genesis Arms black-oxide anodized upper receiver and a redesigned lower receiver compatible with PDW stocks, it's purpose-built for aggressive, fast-moving players who want overwhelming firepower in confined spaces.

  • Engine: HAVOC 6 HPA — 6 BBs per shot, up to 6 shots/second
  • Receiver: CNC-machined aluminum DPMS set, black oxide (Genesis Arms licensed)
  • Rail: 7" Invictus M-LOK | Lower: PDW stock compatible
  • Electronics: Spartan Control Board, semi/burst/full-auto
  • Magazine: 140-round 308 with empty mag detection
  • Inner barrel: 208mm | Input pressure: 80-140PSI | Weight: 4.2lbs
Features
  • Genesis-Arms licensed, CNC-machined aluminum DPMS receiver set with black oxide finish
  • Lower receiver cut for PDW stock acceptance
  • 7″ Invictus M-Lok rail
  • HAVOC 6 HPA engine
  • Spartan Electronics Control Board
  • Semi, burst, and full-auto capable
  • Spring-loaded mock bolt carrier group with right-hand charging knob
  • A2 grip and stock
  • MTW-Spec 140-round 308 Magazine with empty mag detection
  • Limited MTW-Spec compatibility (Learn more)
  • For more information, see the Owner’s Manual 
Specs
  • Six BBs per shot, up to six shots per second
  • Adjustable velocity 0.6 to 1.1 Joule per BB
  • 208mm Inner Barrel
  • Input Pressure: 80-140PSI
  • 4.2lbs (1.9kg)

Skirmshop USA – Frequently Asked Questions

Please view our FAQ page for more info.

How long does shipping take?

Most orders ship within 1–2 business days from our Florida warehouse.

Typical delivery times:

United States: 2–5 business days
International: 7–21 business days depending on location and customs processing.

Once your order ships, tracking information will be emailed.

Do you ship internationally?

Yes. Skirmshop USA ships worldwide.

International customers are responsible for any import duties, VAT, or customs fees required by their country.

Do you offer preorder products?

Yes.

Some specialty items we carry — including limited runs or hard-to-import gear — may be offered as preorders when inventory is in transit.

Preorders allow customers to reserve items before the shipment arrives. Contact us to coordinate.

What is Skirmshop USA’s return policy?

Customers may return eligible items within 14 days of receiving their order. Items must be returned:

  • Unused
  • In their original condition
  • In the original packaging when reasonably possible

Items should only be handled as necessary to inspect the product.

Full details can be found here: https://skirmshopusa.com/policies/refund-policy

What does Skirmshop USA specialize in?

Skirmshop USA focuses on high-performance airsoft equipment and concealment systems designed for players who prioritize stealth, mobility, and modular gear setups.

We specialize in:

  • Stalker ghillie systems
  • concealment gear
  • premium airsoft platforms
  • upgrade components and accessories

Our goal is to help customers build complete systems that work together, not just individual products.

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