Unleash the beast with Bull Craft’s M249 "Big Green" Box Magazine Insert! Packing 4000 rounds into a compact 200-round real-steel shell silhouette, this mag insert is pure power in a tough Nylon PA12 shell. Featuring a springless Cattle Drive Feed System and a massive motor with external speed control, you stay fully in command during every skirmish. Proudly designed and made in Florida, USA, it’s built to feed flawlessly and dominate the field with playful confidence. Recommended to run on an 11.1v LiPo for peak performance—get ready to go BIG and GREEN!