Jancase 150PCS Rival Ball Refill Pack for Nerf Rival Series : Amazon.in: Toys & Games
1000 Round NERF Rival Nemesis Blaster
Nerf Rival 60 Accu-round Refill : Target
Shopee No.1✳❇♤Pack of 100 Refill Balls Compatible Bullet Darts for Nerf Rival Zeus MXV 1200 Apollo X | Shopee Philippines
Amazon.com: POKONBOY 300 Rounds Refill Pack Balls Ammo Compatible with Nerf Rival Gun, Foam Bullet Ball Replacement Refill Pack for Blasters Guns : Toys & Games
Nerf Rival 50-Round Refill Pack, 50 ct - Kroger
Nerf Rival 25-Round Refill Pack - Walmart.ca
left the one on the left in the melting snow, and apparently rival balls are similar to sponges. they are off brand so maybe that has something to do with it. :
Nerf Rival Ammo Comparison | 2019 Part 1 - YouTube