Per analogiam with less advanced weapons, we have figured out how to disassemble Plasma Weapons - which doesn't mean we know how to use them or how they work.
Plasma weapons can be broken down into 5 main components: Energy Weapon Parts, Plasma Chambers, Inertial Accelerators, Heavy Power Couplings and what we call Magischen-Motors. Here's the breakdown of how many parts various types and sizes contain:

Small: 1/1/0/0/1 Sub: 2/2/0/0/1
Standard: 2/1/1/0/1 Large: 3/1/2/1/1
X-Large: 4/2/2/2/1 Small Craft: 10/4/4/2/2
Large Craft: 20/8/8/4/2