Nerf Rival Finisher XX-700 Blaster -- Quick-Load Magazine, Spring Action, Includes 7 Official Nerf Rival Rounds -- Team Blue | Walmart Canada
Nerf Rival Magazine - Etsy
Nerf Rival 18-Round Refill Pack, 2 clips and 12-Round Magazine NEW In Packaging | eBay
Amazon.com: Nerf Rival 40-Round Refill Pack and 40-Round Magazine : Toys & Games
I'm not sure when Nerf plans on releasing their version, but I finally completed the second revision of my Nerf Rival drum magazine. Will be testing this once all the hardware comes