Casio’s latest G-Shock Gravitymaster, Mudmaster, and Mudman finally land in the US

Casio has finally dropped its new G-Shock "Master of G" collection in the US. The collection, which consists of a Mudmaster, Mudman, and Gravitymaster pilot watch, was first announced in Japan in early August and subsequently made its way to Europe toward the tail end of the month. The US release took its sweet time, but the trio is now officially up for grabs on Casio's US website.

Pricing starts at $330 for the Gravitymaster GRB300H-5A and goes up to $460 for the Mudmaster GGB100XMH-5A. Meanwhile, the Mudman GW-9500MH will set you back $440.

The trio shares a common design language, featuring a light yellow gold ion-plated bezel, earthy brown accents, and a dark brown resin strap that gives the collection a more tactical, outdoorsy look. Here's a brief rundown of each model.

Mudmaster

The Mudmaster GGB100XMH-5A is the most feature-packed of the group. It combines a stainless steel bezel with a carbon fiber-reinforced resin case and Carbon Core Guard construction, while packing ABC sensors (a digital compass, altimeter, barometer, thermometer) and step tracking. It also boasts Bluetooth and can be paired with your phone via the Casio Watches app for automatic time syncing and Mission Log tracking.

Key features

• Dimensions: 55.4 × 51.3 × 19.4 mm
• Weight: 104g
• Case & bezel material: Bio-based carbon / stainless steel
• Construction: Shock-resistant, mud-resistant, Carbon Core Guard structure
• Water resistance: 200 meters
• Triple Sensor tech (Digital compass, altimeter, barometer, thermometer, and 3-axis step counter)
• Battery life: Approximately 2 years on a CR2025 battery

Mudman

Next up, we have the Mudman GW9500MH-5. This one skips Bluetooth but adds Casio’s Multi Band 6 radio-controlled timekeeping alongside Tough Solar charging. Its Triple Sensor setup delivers compass, altitude, barometric pressure, and temperature readings, while a duplex LCD makes the data easier to read at a glance.

Key features

• Dimensions: 56.7 × 52.7 × 14.8 mm
• Weight: 88g
• Duplex LCD with improved readability
• Construction: Shock-resistant, mud-resistant, Carbon Core Guard structure
• Water resistance: 200 meters
• Multi-band 6 radio-controlled timekeeping
• Triple Sensor tech
• Tough Solar charging

Gravitymaster

Rounding out the collection is the Gravitymaster GRB300H-5A. It's the lightest timepiece in the lineup at 71 grams. Featuring a design that is said to be inspired by next-generation aircraft, it comes equipped with a carbon-reinforced case, Tough Solar charging, Bluetooth connectivity, dual-time support, and flight logging. It features a rotating disc at 9 o’clock that serves as a battery, stopwatch, and mode indicator.

Key features

• Dimensions: 59 × 54.7 × 15.7 mm
• Weight: 71g
• Case & bezel material: Bio-based carbon / bio-based resin / stainless steel
• Connectivity: Bluetooth with CASIO WATCHES app
• Rotary indicator: Displays alarm status, stopwatch information, and battery level
• Flight log feature
• Dual time with home/local time swapping
• Tough Solar charging

View Casio G-Shock GWG-B1000-1AJF Master of G Series Mudmaster on Amazon