Bull Craft MAVERIX Series - M249 "Big Green" Box Magazine Insert

$169.95
(1 review) Write a Review

BCI M249 "Big Green" 4000rnd Magazine Insert – MAVERIX Series

Meet “Big Green” — Bull Craft’s beast-mode M249 insert built for high-capacity dominance. With 4000 rounds packed into a compact 200-round real-steel shell profile, this is the biggest, boldest mag insert we’ve made. Powered by our trusted springless Cattle Drive Feed System, a massive motor with external speed control, and housed in ultra-durable Nylon PA12, this unit is primed for flawless feeding and serious field performance. Designed, printed, and powered in Florida, USA.

This thing isn’t just tough—it’s tactical.

  • ✅ Made in the USA
  • ✅ Massive Motor w/ External Speed Control – keeps you in the driver’s seat
  • ✅ Springless Design for Consistent Feeding
  • ✅ Super Durable Nylon PA12 Construction 
  • ✅ Comes with Bowden Spring
  • ✅ Wiring Diagrams Available
  • ✅ Tested with: Titan, Aster, Leviathan, Gate Warfet
  • ✅ Superb Support via email, phone, Facebook, Instagram, and in-store
  • ✅ Quick Turnaround & Reliable Shipping
  • ✅ Actual Availability — No ghost listings

All Bull Craft drum magazines and inserts require a Trigger Control Unit (TCU) when paired with HPA platforms such as PolarStar or Wolverine. Without a TCU, standard FCUs lack power for motor-driven feeding. This applies across our MAVERIX Series—if it runs HPA, it needs a TCU. Already own an Airsoft Junkiez TCU? You’re good to go—our system runs seamlessly with it.

Weight: .5 lb 

Capacity: 4000 rounds (Note: External housing delivers 4000-round capacity while retaining 200rnd shell size)

Built Right. Ready to Fight.

1 Review Hide Reviews Show Reviews

  • 5
    Best Mag Insert

    Posted by Nathaniel Capps on 29th Nov 2024

    Excellent build quality and craftsmanship, this mag has outperformed all my other mags including the Bullgear. 10/10 mag all around, will be picking up more inserts down the road for my other LMGs!