SmallRig 3874 is a magic arm with two ball heads and a center lever. Top end has a 1/4″-20 screw, bottom end an ARRI locating 3/8″-16 with spring pins. Payload 5.5 kg, weight 90 g.
Typical use is mounting a monitor or EVF on a top handle or cage with ARRI holes. Silicone seals on the ball heads increase friction; the screws are tightened with thumb wheels.
Ideal for
Why SmallRig Magic Arm 3874 with two ball heads (1/4″ + ARRI 3/8″)
- High payload – Carries up to 5.5 kg at a weight of 90 g.
- ARRI locating – 3/8″ mount with pins, no rotation.
- Spring pins – Installs on surfaces without holes.
- Magnetic key – Included for tightening.
Key specs
| Type | Magic arm (two ball heads) |
|---|---|
| Mount | 1/4″-20 + 3/8″-16 ARRI locating |
| Compatibility | cages and handles with ARRI holes, universal 1/4″ |
| Size / length | 121.5 × 24 mm |
| Payload | 5.5 kg |
| Material | aluminium, steel, rubber |
| Weight | 90 g |
Construction
| Joints | 2 ball heads, center locking lever |
|---|---|
| Pins | spring, anti-rotation |
| Accessories | magnetic key, 2 silicone rings |
