G-Shock & Pro Trek / Head to head
Rangeman vs Mudmaster vs Mudman: which Master of G should you actually buy?
Three Tough Solar triple-sensor G-Shocks, three different answers. The Rangeman is the proven one, the Mudmaster the sapphire one, the Mudman the slim one. Casio's guides decide the rest.
By Mike M.Updated Researched from the maker's manuals and spec sheets
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Our top pick
G-Shock Rangeman GW-9400
Solar, atomic, triple sensor, sunrise/sunset, cold-rated, 200 m, mud-resistant. Mineral crystal, 93 g, 18 mm.
#ad · Price as of November 12, 2026 · Disclosure for the link to G-Shock Rangeman GW-9400
The contenders
Side by side
Buy this for the record
G-Shock Rangeman GW-9400
Solar, no charger9.8 /10Solar, atomic, triple sensor, sunrise/sunset, cold-rated, 200 m, mud-resistant. Mineral crystal, 93 g, 18 mm.
$329.99Amazon#ad · Price as of November 12, 2026 · Disclosure for the link to G-Shock Rangeman GW-9400
Buy this for the sapphire
G-Shock Mudmaster GWG-2000
Solar, no charger9.8 /10Solar, atomic, triple sensor, sapphire, forged carbon. 106 g, 61 mm wide.
$699.00Amazon#ad · Price as of November 12, 2026 · Disclosure for the link to G-Shock Mudmaster GWG-2000
Buy this for the wrist
G-Shock Mudman GW-9500
Solar, no charger9.6 /10Solar, atomic, triple sensor, sunrise/sunset, duplex LCD. 81 g, 14.8 mm.
$347.00Amazon#ad · Price as of November 12, 2026 · Disclosure for the link to G-Shock Mudman GW-9500
Verdict
Specs that differ
Power and time
Casio's guides: the GW-9400 runs about 8 months from a full charge with no light (from full charge to Level 4, under listed usage); the GWG-2000 and GW-9500 about 6 months. All three receive radio time calibration; the GW-9400 and GW-9500 are Multi-Band 6 and the GWG-2000 guide lists the same five signal types (JJY, WWVB, MSF, DCF77, BPC). Worn outdoors, all three stay charged indefinitely; the months figure is for a drawer.
Sensors and sunrise/sunset
Compass, barometer, altimeter and thermometer on all three, with Casio stating ±10° direction and ±3 hPa pressure accuracy on the GW-9400 and GWG-2000 guides. Sunrise/sunset display is listed in the GW-9400 and GW-9500 guides; it is not on the GWG-2000 specifications page we read, so we do not credit it. For a hunter, that is a real difference, and the reason the hunting G-Shock rankings lead with the Rangeman and Mudman.
Crystal, case and weight
GWG-2000: sapphire with anti-glare, forged carbon bezel with resin and stainless steel, Carbon Core Guard case, 61.2 × 54.4 × 16.1 mm, 106 g. GW-9400: mineral, resin, 55.2 × 53.5 × 18.2 mm, 93 g. GW-9500: mineral, carbon and resin, 56.7 × 52.7 × 14.8 mm, 81 g. The Mudmaster is the only one whose crystal will not scratch; the Mudman is the only one that disappears under a cuff.
Who should buy none of them
Anyone who wants a track of where they walked: a Garmin Instinct. Anyone who wants the sensors at half the weight and can accept 100 m: a Pro Trek PRW-61. Anyone who wants GPS in a G-Shock case: the GPR-H1000, on G-Shock with GPS.
In detail
The contenders, in full
Buy this for the record
G-Shock Rangeman GW-9400
Solar, atomic, triple sensor, sunrise/sunset, cold-rated, 200 m, mud-resistant. Mineral crystal, 93 g, 18 mm.
EvidenceResearched · every row sourced
| Power class | Solar, no charger. A solar cell that recharges from any light and never meets a charger. The rechargeable cell is a watchmaker-replaceable part. |
|---|---|
| Battery (cell) | Approximately 8 months from full charge to Level 4 with no light (Casio's stated usage conditions) |
| Power | Solar panel and one rechargeable battery (Tough Solar) |
| Glass | Mineral crystal |
| Water rating | 200 meters |
| Sensors | Digital compass, barometer, altimeter, thermometer; sunrise/sunset; Multi-Band 6 time calibration (WWVB, DCF77, MSF, JJY, BPC) |
| Weight | 93 g |
| Size | 55.2 × 53.5 × 18.2 mm |
| Operating temp | Low-temperature resistance -10°C (14°F) |
What the 9.8 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- Solar and atomic: it sets itself from a radio signal and never sees a cable.
- A module that has been in production for over a decade; parts, straps and bezels are everywhere.
- Sunrise/sunset on the watch, the one hunting feature the Garmin Instinct does without a phone.
Good to know
Mineral crystal, not sapphire; the Rangeman lives behind a raised bezel for a reason.
#ad · Price as of November 12, 2026 · Disclosure for the link to G-Shock Rangeman GW-9400
Buy this for the sapphire
G-Shock Mudmaster GWG-2000
Solar, atomic, triple sensor, sapphire, forged carbon. 106 g, 61 mm wide.
EvidenceResearched · every row sourced
| Power class | Solar, no charger. A solar cell that recharges from any light and never meets a charger. The rechargeable cell is a watchmaker-replaceable part. |
|---|---|
| Battery (cell) | Approximately 6 months with no light (Casio's stated usage conditions) |
| Power | Solar panel and one rechargeable battery |
| Glass | Sapphire with anti-glare coating |
| Bezel & case | Carbon Core Guard case; forged carbon, resin and stainless steel bezel |
| Water rating | 200 meters; shock resistant; mud resistant |
| Sensors | Digital compass, altimeter, barometer, thermometer; radio time calibration (JJY, WWVB, MSF, DCF77, BPC) |
| Weight | 106 g |
| Size | 61.2 × 54.4 × 16.1 mm |
What the 9.8 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- Sapphire on a G-Shock: the glass that stops the usual first failure.
- Forged carbon bezel and a carbon monocoque case.
- Solar and atomic like the Rangeman.
Good to know
At 106 g and 61 mm wide it is the heaviest watch on this site.
#ad · Price as of November 12, 2026 · Disclosure for the link to G-Shock Mudmaster GWG-2000
Buy this for the wrist
G-Shock Mudman GW-9500
Solar, atomic, triple sensor, sunrise/sunset, duplex LCD. 81 g, 14.8 mm.
EvidenceResearched · every row sourced
| Power class | Solar, no charger. A solar cell that recharges from any light and never meets a charger. The rechargeable cell is a watchmaker-replaceable part. |
|---|---|
| Battery (cell) | Approximately 6 months with no light (Casio's stated usage conditions) |
| Power | Solar panel and one rechargeable battery |
| Glass | Mineral |
| Bezel & case | Carbon, resin and bio-based resin |
| Water rating | 200 meters; shock resistant; mud resistant |
| Sensors | Digital compass, altimeter, barometer, thermometer; sunrise/sunset times |
| Weight | 81 g |
| Size | 56.7 × 52.7 × 14.8 mm |
What the 9.6 score weighs
- Battery & power independence (25% of the score)
- Durability of materials (25% of the score)
- Serviceability & lifespan (20% of the score)
- Field usability (15% of the score)
- Value per decade (10% of the score)
- Mission fit (5% of the score)
What the spec sheet supports
- 3.4 mm thinner and 12 g lighter than the Rangeman GW-9400 by the published figures.
- Mud-resistant buttons and a carbon-reinforced case.
- Sunrise/sunset and a barometer graph for reading weather in a stand.
Good to know
Six months of stated dark-running versus the Rangeman's eight.
#ad · Price as of November 12, 2026 · Disclosure for the link to G-Shock Mudman GW-9500
The bottom line
Our recommendation
Buy this one
Solar, atomic, triple sensor, sunrise/sunset, cold-rated, 200 m, mud-resistant. Mineral crystal, 93 g, 18 mm.
#ad · Price as of November 12, 2026 · Disclosure for the link to G-Shock Rangeman GW-9400
How we scored this
What we checked to build this ranking
Every pick here is researched against the documents that decide whether a watch lasts: the maker's own battery table read mode by mode, what the lens and case are actually made of, the water rating, whether a MIL-STD-810 line is on the record and in whose words, and how long the maker keeps updating the line. Each one is then scored on a public rubric weighted for a decade of ownership, and every figure links to where it came from.
That is why the order on this page is worth following: it is built from specs you can open yourself, and commissions never set a score or decide a pick. The rubric and its weights are published.
Questions
Frequently asked
Is the Mudmaster better than the Rangeman?
On materials, yes: sapphire and forged carbon vs mineral and resin. On features and battery, the Rangeman leads: sunrise/sunset in Casio's guide and about eight months of stated dark-running vs six. On weight, the Rangeman by 13 g.
What is the difference between Mudman and Rangeman?
Same sensors, sunrise/sunset, solar and Multi-Band 6. The Mudman GW-9500 is 3.4 mm thinner and 12 g lighter with a carbon-reinforced case and a duplex LCD; the Rangeman GW-9400 has two more months of stated battery and a longer production record.
Which Master of G is the toughest?
The Mudmaster GWG-2000, on the strength of its sapphire crystal and Carbon Core Guard case. See toughest G-Shock.
What about the Frogman?
The Frogman is the fourth Master of G line and it is not in this comparison because it is a water watch with no ABC sensors: no compass, altimeter, barometer or thermometer. What it has instead is an ISO diver's 200 m rating, sapphire, a carbon monocoque case and a tide graph. If you dive, read the Frogman GWF-A1000 review; if you want sensors on land, the three watches above are the right set.
Keep reading
Related on Bezel & Bearing
Receipts
Sources
- Casio — Operation Guide, module 3410 (GW-9400 Rangeman), Specifications (checked 2026-09-20)
- Pilot Mall — Casio G-Shock Rangeman GW9400-1 listing (case size, weight, water rating) (checked 2026-09-20)
- Casio — Operation Guide, module 5678 (GWG-2000 Mudmaster), Specifications (checked 2026-09-20)
- G-Central — G-Shock GWG-2000 Mudmaster spec sheet (checked 2026-09-20)
- Casio — Operation Guide, module 3553 (GW-9500 Mudman), Specifications (checked 2026-09-20)
- G-Central — G-Shock GW-9500 Mudman spec sheet (checked 2026-09-20)
Battery, glass, case and water figures come from the maker's own owner's manuals, spec pages and press releases, linked on every product so you can open the page they came from. Prices are set by Amazon and change often, so each buy button takes you to the current one. Read the full method.