NERF - N-Strike Elite Modulus Range Kit - blasterparts.com
NERF Longstrike Modulus Toy Blaster with Barrel Extension, Bipod, Scopes, 18 Modulus Elite Darts and 3 Six-Dart Clips for Kids, Teens, and Adults (Amazon Exclusive) : Toys & Games
Hasbro HSBB1537 Nerf Modulus Long Range Upgrade Kit - Set of 4 - Walmart.com