IN STOCK Complete purchase by 3pm CST and order will ship same business day.

The Preston MDR3 / MDR4 Ultra Arm Mounting Kit (3/8-16 ARRI Accessory Mount) is an articulating arm with a set of 25mm (1 inch) ball joints which allow the Preston MDR3 or MDR4 to be positioned in just about any orientation. One end is the mounting bracket for Preston and the other is a tool-less 3/8-16 knob with non-slip rubber pads. Also included are two locating pins that can be installed on the 3/8-16 end turning it into an ARRI accessory mount compatible device.

Ultra Arm components are interchangeable so you can use this arm in conjunction with the other options we make like 1/4-20, 3/8-16, NATO Clamp, Hot Shoe, and Super Clamp.

Many existing 3rd party 25mm ball systems are compatible as well.

Specifications:
Weight: 317.5g (0.7 lbs)
Dimensions: 50.8 x 101.6 x 203.2 mm ( 2 x 4 x 8 in)