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

Name: SmallRig Magic Arm with Dual Ball Heads (1/4"-20 Screws)
Brand: SmallRig
SKU: SM3873
Price: 29.99 USD
Availability: InStock
Rating: 4.8 (20 reviews)

BH #SM3873 • MFR #3873

20 reviews

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

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Key Features

4.7" Arm with 2 Ball Heads
For Monitors, Viewfinders, Lights & More
12 lb Load Capacity
1/4"-20 Screws on Each End

Add this durable Magic Arm with Dual Ball Heads from SmallRig to your rig to mount and adjust monitors, viewfinders, lights, mics, and other accessories. It features dual ball heads and 1/4"-20 screw mounts with tightening thumbwheels and anti-twist locating pins on each end. This lightweight aluminum and stainless steel arm has a load capacity of 12 lb. Each ball mount features a silicone gasket to add grip and friction to the mount when adjusting position, and both are tightened with a center locking lever. A magnetic wrench is included to help tighten the thumbwheels.

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Mounting

1/4"-20 to 1/4"-20

1/4"-20 to 3/8"-16

1/4"-20 to NATO Clamp

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SmallRig 3873 Overview

EAN: 6941590009315

SmallRig 3873 Specs

Load Capacity	12.1 lb / 5.5 kg
Top Mount	1/4"-20 Male
Bottom Mount	1/4"-20 Male
Points of Articulation	2
Material of Construction	Aluminum, Rubber, Steel
Segment Length	5" / 120 mm
Width	1" / 24 mm
Weight	3.1 oz / 88 g

Packaging Info

Package Weight	0.315 lb
Box Dimensions (LxWxH)	6.5 x 4.2 x 1.7"

SmallRig 3873 Reviews

Great Quality and Feel

By Stephen

Rated 5 out of 5

Date: 2026-08-04

These things are excellent. I bought multiples and I'm glad I did — everything has a thread mount! If only everything had locating pin holes as well ...

A little clumsy and flimsy

By Wade

Rated 3 out of 5

Date: 2025-08-14

The clamp handle is quite large and gets in the way a bit - it's surprisingly fiddly and awkward to manoeuvre things around such that you can position it where you want while also leaving enough room to tighten the clamp. I find it near impossible to tighten the screws enough to keep it locked in place. The meagre torque afforded by its length is more than enough to overcome the hand-tightened screws. It's better than a simple flexible arm in terms of precise positioning, but not really any better in terms of rigidity.

See any errors on this page?

Can i use smallrig clamps with this?

Asked by: Gabriel

The SmallRig Magic Arm with Dual Ball Heads (1/4"-20 Screws) is compatible with Smallrig crab clamps as long as you remove the locking pins.

Answered by: Jonathan S

Date published: 2023-10-09

Are the locator pins spring loaded and ...

Are the locator pins spring loaded and retractable?

Asked by: David

Yes, the SmallRig Magic Arm with Dual Ball Heads (1/4"-20 Screws) locator pins will retract.

Answered by: Chris H

Date published: 2023-02-08

Ball head size? 20mm?

Asked by: David

Correct, the ball portion of the SmallRig Magic Arm with Dual Ball Heads' (1/4"-20 Screws) ball heads is 20mm.

Answered by: Paige K

Date published: 2023-08-10

What is the difference between this product and ...

What is the difference between this product and the Smallrig Articulating Arm which is more expensive? BH #SM2070B

Asked by: Sarah

I cannot find a good indicator that differentiated the two to make the more expensive option better other than an easier handle to twist.