Advanced acceleration system: The Prometheus MXVIII-20k Nerf Rival blaster features an Advanced Acceleration System that fires up to 8 rounds per
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Nerf Rival Prometheus MXVIII-20K Blaster with 200 Nerf Rival
High-Power Foam Ball Blasters : Nerf Rival Prometheus MXVIII-20K
NERF Rival Prometheus MXVIII-20K Toy Blaster
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2018 Nerf Rival Prometheus MXVIII-20K
NERF Rival Prometheus MXVIII-20K - Blaster-Time