Most PRS electric basses feature a vintage-inspired plate style bridge with modern updates. The saddles are adjustable for string height and intonation. They are also prevented from sideways movement by grooves in the base plate, which cradle the saddle height screws.
The intonation can be adjusted by moving the four Phillips head screws facing the tail end of the bass guitar.
Factory setup specifications can be found at the following link: Setup & Adjustments – PRS Guitars