Amazon.com: M4 Gel Ball Blaster, Electric Splatter Ball Blaster Automatic 20000+ Water Beads Gun with 1200 Rounds Water Bead Drum & Infrared Sighting for Outdoor Yard Activities Shooting Game (Ages 12+) :
My completed M4A4-inspired Retaliator. : r/Nerf
3D Printed Nerf stock M4 style by ChaserDK | Pinshape
Nerf M4 Stryfe Clone | NerfGunAttachments | The Nerfer's eMall
Amazon.com: Toy M4 Barrel Extension for Nerf Models with an Interchangeable Barrel Compatible (Orange) : Toys & Games