By Rock Mods
Rock Mods Hammerhand V3R Mech Mod

Hammerhand V3R Mech Mod
The Hammerhand V3R is a bottom-fire mechanical mod machined from Navi Brass and finished by hand in Cerakote. There is no chipset inside it and no screen to read. Press the switch and the battery is connected straight to your build, which is the whole point of a mech and the reason it needs a builder who knows what they are doing.
Hammerhand V3R Key Features
- Bottom fire switch in the base of the tube
- Hand-applied Cerakote, so no two finishes are alike
- Full battery voltage with no circuitry in the way
- Suited to low-resistance rebuildable builds
- Five finishes to choose from
- Hard case included for storage and transport
- Designed and finished by Rock Mods Co
- Battery sold separately
Bottom Fire Switch
The switch is a flat engraved disc set into the knurled base of the tube. You wrap your hand around the body and press it with a finger curled underneath, rather than reaching for a bar on the side. If you prefer a side-fire bar, the Rock Mods Swordfish V2 covers that layout.
Navi Brass and Cerakote
Brass carries current well and holds up to being stripped and cleaned, which is why mechs are built from it. The Cerakote on the outside is a ceramic coating applied by hand, so it resists knocks and the pattern varies from piece to piece. Five finishes: Black, Alien, RocketBunny, Thrasher and Andromeda, all Rock Mods pattern names rather than licensed designs.
21700 Battery
A single 21700 cell, with no charging port on the mod, so it comes out and goes into an external charger. A high-drain cell such as the Vapcell P42A 21700 is the right sort of thing to pair with it.
Check the wrap for nicks every time the cell goes in and rewrap at the first sign of damage. Our battery and coil safety guide covers the handling and charging side.
Atomiser Fit
It is a hybrid connection, so only fit an atomiser whose 510 pin clearly stands proud of its threads. The top suits atomisers in the 24mm to 25mm range, which covers most single and dual coil RDA tanks without overhang.
Building for a Mech
Nothing sits between the battery and your coils, so the build decides everything and there is no cut-off to catch a mistake. Meter every build before it goes on the mod and keep the amp draw well inside the continuous discharge rating of your cell. Our Ohm's Law Calculator does that sum and flags a build that pulls too hard.
Wrap count, inner diameter and wire gauge all move the final resistance. Our Coil Building Calculator gets you to the number you wanted before you cut any wire.
If you would rather not wind your own, our coil range covers ready made and hand-wound.
Who It Suits
Experienced builders who already own a meter, a charger and a set of cells. It is not a first mod. The rest of the range sits in our Rock Mods collection.
Hammerhand V3R Specifications
| Brand | Rock Mods Co |
| Model | Hammerhand V3R |
| Mod Type | Mechanical, Unregulated |
| Battery | 1 x 21700 |
| Battery Included | No |
| Firing | Bottom Fire Switch |
| Body Material | Navi Brass |
| Coating | Cerakote Firearm Coating |
| Connection | Hybrid 510 |
| Atomiser Diameter | 24mm to 25mm |
| Chipset | None |
| Charging | External Charger Required |
| Packaging | Hard Plastic Case |
| Finishes | Black, Alien, RocketBunny, Thrasher, Andromeda |
What's in the Box?
- 1 x Rock Mods Hammerhand V3R Mech Mod
- 1 x Hard Plastic Carry Case
Battery not included. Requires a single 21700 battery (sold separately). Mechanical mods have no built-in protection and are for experienced builders only.
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Product Highlights
Type of Device: Mechanical Mod
1 x 21700 External Battery
Bottom Fire Switch
Cerakote Hand-Finished Coating
Colour
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