This page doesn't cover a complete overview of the marker, but does highlight some of its main parts. THe main components consist of a stacked-tube firing assembly, and valve system located in front. The firing assembly is removed from the rear of the body as shown here...
The valve system is retained in place by a set screw accessible through the body's underside, so it can't be removed without first removing the frame. However you are able to access the valve poppet and LPR located in the front. The LPR itself is integrated into the valve's front endcap, and is removed by unscrewing.
The LPR design is that of a moving base type reg, where the piston is physically pushed down against a sealing base to perform the pressure drop. The adjustment is located in front of the LPR housing, externally-accessible.
The small ports located on the backside provide input air bypassing the reg. The LPR's output leads to an internal manifold chamber leading back to the solenoid.
The valve system is relatively standardized. It uses an unbalanced poppet which gets knocked open to fire. The valve is reset after firing by a conical spring.
As The valve poppet is removeable although the remaining housing stays within the body. It can't be removed without accessing the underside of the body.
Frame removal:
This process begins by removing the grip panels to reveal the electronics. The battery slides out and can be unplugged.
After unplugging the two harnesses from the board (solenoid and eyes) the frame can be separated from the body. The screws sit within machined grooves accessible through the top of the frame, but holes are drilled to allow unscrewing.
The solenoid bolts up to the underside of the body, but is easily removed by unscrewing the screws. The body looks like this...
The solenoid is proprietary to DP and used only on their markers (with slight variations between their other markers). This particular model is a 3-way normally-closed solenoid, which outputs air pressure to fire and ceases when not.
Grease is likely to accumulate within the solenoid so cleaning it from time to time isn't a bad idea. It can be disassembled by removing the lateral screws to separate the two housing sections. Shown here...
The eye covers can be removed for cleaning or servicing, done so by unscrewing the two screws holding them on. The eyes are of the typical and reliable 3-mm wire type, and both connect to the same harness
Prior to using the marker again, reassemble and test the eyes and solenoid to make sure all electronics functions work properly.
An animation of the marker can be seen here: (fast; slow)
