Huge thanks to Enos Shenk for supplying all of this info!

Pro-Lite

Barrel pinch bolt - 1/4-20 thd, 5/8" length
Elbow pinch bolt - 1/4-20 thd, 1" length
Gripframe mount bolts - 10-32 thd, 3/8" length
Gripframe half bolt (top) - 10-32 thd, 7/8" length
Gripframe half bolt (bottom) - 10-32 thd, 1 1/4" length
Velocity adjustment bolt - 1/4-28 thd, 3/4" length set screw
Gripframe mount sleeves - 10-32 thd internal, 5/8" length, 1/4" diameter

Pro-Carbine (Many of these are applicable to 68-Carbine as well)

Barrel pinch bolt - 1/4-20 thd, 5/8" length
Elbow pinch bolt - 1/4-20 thd, 1" length
Gripframe mount bolts - 10-32 thd, 3/8" length
Grip panel bolts - 6-32 thd, 3/8" length
Bottomline mount bolts - 10-32 thd, 1" length
Velocity adjustment bolt - 1/4-20 thd, 7/8" length

98 Custom

Elbow pinch bolt - 1/4-20 thd, 1" length
Elbow latch bolts (Holding the part that catches the front sight) - 6-32 thd, 1/4" length
Main half bolts - 10-32 thd, 5/8" length
Foregrip half bolt - 10-32 thd, 1 1/8" length
Grip panel bolts - 6-32 thd, 3/8" length
Bottomline mount bolts - 10-32 thd, 1" length
Valve bolts - 10-32 thd, 1/4" length
Velocity adjustment bolt - 1/4-28 thd, 3/8" length set screw

Rear bolt O-Ring: -19 size
Front bolt O-Ring: -15 size
Valve body O-Ring: -19 size
Inside valve O-Rings (2x): -12 size

C-3

All major half bolts - 10-32 thd, 5/8" length
Front sight pinch bolt - 10-32 thd, 1" length
Grip panel bolts - 6-32 thd, 3/8" length
Regulator bolts - 10-32 thd, 1" length
Bottomline bolts - 10-32 thd, 1" length

Extra notes:
C-3 Rear sight piece, stock grip panels, and trigger guard are identical to these 98 Custom parts. The C-3 also has a single push pin identical to that of an A-5 for the reciever to pump guide rod mount.

Also the gas transfer tubing on the right side of the reciever uses Clippard part number UT0-2 swivel fittings.

X-7

Main half bolts: 4x 10-32 thd, 5/8" length, 2x 10-32 thd, 7/8" length
Cyclone mounting bolt: 1/4-20 thd, 7/8" length
Bottomline bolt: 10-32 thd, 1 1/8" length
Foregrip side rail bolts: 6-32 thd, 1/4" length
Front sight bolt: 10-32 thd, 7/8" length
Rear sight bolts: 10-32 thd, 1" length
Rear bolt O-Ring: -19 size
Front bolt O-Ring: -15 size
Valve body O-Ring: -19 size
Inside valve O-Ring (Behind the valve seat): -12 size
Valve tombstone O-Ring: -111 size
End cap O-Ring: -117 size
Extra notes: Uses push-pins the same as the A-5.
Trigger guard is the same as the A-5.

98 Custom Platinum

Elbow pinch bolt - 1/4-20 thd, 1" length
Elbow latch bolts (Holding the part that catches the front sight) - 6-32 thd, 1/4" length
Main half bolts - 6x 10-32 thd, 5/8" length
Foregrip half bolt - 10-32 thd, 1 1/8" length
Grip screws - 4x 6-32 thd, 1/4" length
Velocity adjustment bolt - 1/4-28 thd, 3/8" length set screw
Weaver rail bolts - 3x 6-32 thd, 3/8" length
Rear bolt O-Ring: -19 size
Front bolt O-Ring: -15 size
Valve body O-Ring: -19 size
Valve internal O-Rings: 2x -12 size
Large O-Ring set into the right gun half, seals the cyclone/RT air tap: -116 size
Extra notes: Uses no valve bolts like the original 98.
The gas line to the valve is a special fitting, using a left-hand threaded square nut inside the gun halves.

Other

The RT kits and the A-5 Cyclone air fittings are stock parts from Clippard.
Swivel fittings: Clippard part number UT0-2
Flow control for RT: Clippard part number MFC-3AK1
Hose: Clippard part number URH1-0402-BKS-050
Tank O-Rings are the same size as Tippmann front bolt O-Rings, -15 size.