Specifications
The Promaster has a significantly smaller profile than its Bushmaster predecessor. It is an electronic solenoid-actuated computer controlled marker. The major components of the marker are machined from solid, aircraft-grade aluminum, and then hard anodized. The stock board can operate in Semi-Automatic mode, Ramp Automatic, Ramp, and Ramp burst. All modes can be capped at 15bit/s or completely uncapped. Modes are selected by changing switches on the circuit board under the markers grip.
The Promaster comes stock with a 12" ported barrel with Autococker/Intimidator threads. The stock marker also comes with a four-way adjustable aluminum double trigger, electronic break-beam eye, delrin bolt, and quick pull pins for field stripping.
Designed to operate on low-pressure, The main operating pressure is 250-300 PSI, which can be monitored via the gauge on the primary (input) regulator. The secondary pressure is factory preset and regulated to 85-95 PSI. Gas usage is controlled through these 2 internal regulators. C02 is not a recommended propellant for the Promaster or any electropneumatic marker, as the cold liquid CO2 can destroy a solenoid valve. Instead, regulated High Pressure Air or Nitrogen systems are recommended although CO2 may be used if an Anti-siphon tube has been installed inside the CO2 bottle.
Since the Promaster is able to reach firing rates of over 15 bit/s (30 bit/s is claimed by Indian Creek), it will operate best when used with a force-fed hopper such as Vlocity/Vlocity Jr, Halo, Empire B, Pulse, Fasta, and or a Dye Rotor. However a force-fed hopper is not absolutely necessary and an agitated, or other electronic hopper, may be used with the Promaster at lower rates of fire (i.e. Viewloader Evlution 2 or 3, Revolutions, Halo TSA Frontman and Backman, Ricochet Apache, etc.)
Read more about this topic: ICD Promaster