- Ninja

First Impressions
The AMF Ninja presents itself as a standout option in your arsenal for demanding conditions. Built around the Ninja Asymmetric core, this ball delivers an extremely stable foundation for heavier oil patterns with a 2.50 RG and a 0.052 differential (intermediate differential: 0.016). The solid reactive cover provides outstanding traction in the early phase of the lane. Thanks to the factory 2000 Abralon surface, the ball reads the heads very early and develops consistent rotation through the midlane. Visually it is very appealing and immediately signals its focus on heavy oil and maximum control. The combination of asymmetric design and this strong cover means this ball loses hardly any energy in the pocket and shows an impressive presence.
Comparison
Head to head with the Brunswick Mindset, the Ninja shows a noticeably smoother and more controlled reaction. Where other asymmetric models often react too aggressively to the transition, this ball maintains a consistently predictable path. The Brunswick Mindset does offer a bit more length through the first two thirds of the lane, but it lacks the outright traction the Ninja builds up in the boards. If you find the Mindset too jumpy, you'll find the necessary stability and predictability here. It forgives release mistakes better than comparable strong balls, yet still keeps the power needed to clear the pins extremely effectively. It shows its undeniable strengths especially on changing conditions.
On the Lanes
For practical use on the lane, this ball is recommended above all on long, high-volume oil patterns. When the heads have enough oil, it can reach its full potential and delivers a continuous hook toward the pocket. The friction at the end of the pattern is picked up gently but decisively, which leads to outstanding carry. If you throw the ball fast, this is the perfect choice for hitting the pocket safely and repeatably. Should the lane dry up as play goes on and the transition set in, it makes sense to plan a ball change early, since it could react too soon on dry boards. It is an excellent ball for wet conditions that fully meets the expectations for modern performance features and should consistently produce high scores.