Earlier generations of Primos Trigger Sticks had a 3/8" - 16 male threaded screw on their head and are directly compatible with the Spartan Davros.

The latest Primos Trigger Sticks (Gen 3) require the official Primos Gen 3 Camera Mount plate, which features a 1/4"-20 male threaded screw. All of our Davros Heads are supplied with a step-down adapter to ensure compatibility.

Step-down adapters are commonly used in the photographic industry and can be easily found at reputable camera shops or online retailers. If you need to purchase an additional step-down adapter, we recommend opting for a machined stainless steel version, as they offer increased reliability in the long run.