Amazon.com: NERF Halo MA40 Motorized Dart Blaster - Includes Removable 10-Dart Clip, 10 Official Elite Darts, and Attachable Rail Riser, White : Toys & Games
Amazon.com: Toy Gun for Nerf Guns Automatic Machine Gun, 3 Modes Toy Foam Blasters Guns for Nerf Guns Sniper Rifle with Bipod, 2 Clips, 100 Bullets, DIY Toy Guns for Boys Gifts
Rifling (works!) and Worker Darts : r/Nerf
Nerf Fortnite Pump SG Blaster, Pump Action Mega Dart Blasting, 4 Nerf Mega Darts - Walmart.com
Newer NERF barrels actually have slight rifling in the barrels : r/interestingasfuck
Amazon.com: Toy Gun for Nerf Guns Sniper Soft Bullets [DIY Assembly] Toy Gun for Boys,Toy Foam Blasters & Guns with 50 Soft Foam Darts, Outdoor Games Toys Gifts for Boys Girls Birthday