Amazon.com: 300 Rounds Refill Pack Balls Ammo Bulk Compatible with Nerf Rival Gun, TiopLior Yellow Foam Bullet Ball Replacement Refill Pack for Nerf Rival Blasters & Toy Blasters Gun(HIR, High-Impact Rounds) :
Amazon.com: NERF Rival 50 Accu-Round Refill Pack, Easter Games, Egg Fillers, Kids Toys, or Basket Stuffers : Toys & Games
LYUMO Rounds Soft Elastic Balls For Rival Zeus Apollo,100pcs Rounds Soft Elastic Balls For Rival Zeus Apollo Toy Compatible Gun Bullet, Round Soft Elastic Balls - Walmart.com
Review: Fake Nerf Rival Balls/Rounds (Cheaper but are they as good?) - YouTube