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 Spec-sheet researched, not worn by us
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The contenders
Side by side
Stock photoBuy this for the record
G-Shock Rangeman GW-9400
Solar, no charger8.7 /10Solar, atomic, triple sensor, sunrise/sunset, cold-rated, 200 m, mud-resistant. Mineral crystal, 93 g, 18 mm.
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- Stock photo
Buy this for the sapphire
G-Shock Mudmaster GWG-2000
Solar, no charger8.7 /10Solar, atomic, triple sensor, sapphire, forged carbon. 106 g, 61 mm wide.
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- Stock photo
Buy this for the wrist
G-Shock Mudman GW-9500
Solar, no charger8.2 /10Solar, atomic, triple sensor, sunrise/sunset, duplex LCD. 81 g, 14.8 mm.
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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
Stock photoBuy 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 · not worn by us
| 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) |
How the 8.7 score breaks down
- Battery & power independence (25%)
- 10
- Durability of materials (25%)
- 7
- Serviceability & lifespan (20%)
- 10
- Field usability (15%)
- 7
- Value per decade (10%)
- 10
- Mission fit (5%)
- 8
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.
Where it falls short
- Mineral crystal, not sapphire; the Rangeman lives behind a raised bezel for a reason.
- No GPS, no maps, no heart rate. It tells you where north is, not where you are.
- Big and thick at 18.2 mm.
Skip this if…
…you want a track of where you walked; an ABC watch measures the world, it does not map it.
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Stock photoBuy this for the sapphire
G-Shock Mudmaster GWG-2000
Solar, atomic, triple sensor, sapphire, forged carbon. 106 g, 61 mm wide.
EvidenceResearched · not worn by us
| 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 |
How the 8.7 score breaks down
- Battery & power independence (25%)
- 9
- Durability of materials (25%)
- 10
- Serviceability & lifespan (20%)
- 9
- Field usability (15%)
- 7
- Value per decade (10%)
- 7
- Mission fit (5%)
- 8
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.
Where it falls short
- At 106 g and 61 mm wide it is the heaviest watch on this site.
- Analog-digital display: harder to read at a glance than a pure digital.
Skip this if…
…you have a small wrist or wear a cuff over your watch.
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Stock photoBuy this for the wrist
G-Shock Mudman GW-9500
Solar, atomic, triple sensor, sunrise/sunset, duplex LCD. 81 g, 14.8 mm.
EvidenceResearched · not worn by us
| 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 |
How the 8.2 score breaks down
- Battery & power independence (25%)
- 9
- Durability of materials (25%)
- 7
- Serviceability & lifespan (20%)
- 9
- Field usability (15%)
- 7
- Value per decade (10%)
- 9
- Mission fit (5%)
- 9
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.
Where it falls short
- Six months of stated dark-running versus the Rangeman's eight.
- Mineral crystal.
Skip this if…
…you want the longest-proven G-Shock module; the Rangeman has a decade more history behind it.
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How we scored this
Watches we claim to have worn or tested: 0
Plenty of sites say they took every watch up a mountain. We didn't, and we say so. What we do instead: read the maker's own battery table mode by mode, check what the lens and case are actually made of, note the water rating and whether a MIL-STD-810 claim exists, ask how long the maker keeps updating the line, and score every pick on a public rubric weighted for a decade of ownership. Every figure links to where it came from.
Scores are editorial judgments from that documented research, not test results. 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.
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)
We don't own or wear-test these watches and we don't pretend to. Battery, glass, case and water figures come from the maker's own owner's manuals, spec pages and press releases (linked on every product), and where a figure isn't published we say so. Prices are set by Amazon and change often, so we don't print them. Read the full method.