The Camera Exchange

SmallRig Magic Arm with Dual Ball Heads (1/4″-20 Screws)

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SmallRig Magic Arm with Dual Ball Heads (1/4″-20 Screws) - Main image
$8.03 $12.95 In stock

Category: General Photo Accessories

The SmallRig 3873 Magic Arm with Dual Ball Heads is a durable, versatile mounting accessory designed to attach and flexibly position equipment such as monitors, viewfinders, LED lights, wireless transmitters, and microphones on camera cages and rigs. Constructed from lightweight aluminum alloy and stainless steel, it supports a heavy payload capacity of up to 12 lb. Featuring 1/4″-20 screw mounts with anti-twist locating pins on both ends, dual ball heads with anti-slip silicone gaskets, and a single ergonomic center locking lever, the 3873 arm allows for quick, secure position adjustments and stable support.

Key Features and Specifications

* Heavy-Duty Load Capacity: Supports up to 12 lb (5.5 kg), making it capable of holding heavier external camera monitors, wireless gear, or lighting accessories.
* Dual Ball Head Design: Provides 360-degree articulation for smooth angle adjustments, locked securely via a single ergonomic center wingnut lever.
* Dual 1/4″-20 Screw Mounts: Equipped with standard 1/4″-20 threaded screws on both ends featuring thumbwheels for fast, tool-less mounting to camera cages and accessories.
* Anti-Twist Locating Pins: Integrated retractable locating pins prevent attached equipment from twisting or unscrewing during use.
* Anti-Slip Silicone Gaskets: Silicone rings on the ball mounts increase grip friction, ensuring smooth positioning and strong locking strength.
* Durable Metal Build: CNC-machined aluminum alloy and stainless steel construction for long-lasting durability without adding excessive weight to your rig.

Condition and Included Accessories

* Included Accessories: SmallRig 3873 Magic Arm unit and magnetic adjustment wrench included (extra replacement silicone rings are NOT included).

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Jason ★★★★★

The dual ball heads give me plenty of adjustment for my LED light, and the locking knobs are smooth and tight—no sagging even with a heavier monitor attached.

Joseph ★★★★★

I’ve used it to angle a monitor over my desk setup, and the dual ball heads let me lock in a precise position without any sagging, even with a heavier LED light attached. The 1/4″-20 screws fit my gear perfectly, and the whole thing feels solid enough for daily use.

Benjamin I. ★★★★★

I was pleasantly surprised by how smoothly the ball heads tighten without any slippage, even when holding my LED light at an awkward angle. The build feels solid enough to trust with heavier gear, and the 1/4"-20 screws fit perfectly on my cage setup.