Plenum Extension for Priest, Prophet & P-3

This extension increases the Plenum’s length by another 22cm, for a total of 57 cm. This provides more air for the pellet/slug, which can result in higher velocities (or lower air consumption).

The Plenum extension is compatible with any of the RTI Airguns:

Priest I

Priest II

Prophet I

Prophet II

P-3

The total plenum volume when the plenum extension is installed on Priest I, Priest II, or Prophet I, is 57cc, whereas for Prophet II and P-3, results in 92cc. In fact, on the Prophet II and P-3, there can be x2 plenum extensions installed simultaneously, resulting in a total volume of 114cc.