I recently got some brand new E&L rifles through. A few rounds in them at most before ripping the internals apart. My tech prefers standard cylinders and heads to work with so I have the pictured parts for sale. 

Original E&L one piece Cylinder/Cylinder head, cylinder head takes mushroom style silent piston heads.

Should fit in any standard V2/V3 gearbox.

Airsoft arms would sell these without a piston head for 45 euros alone. Silly price so I am just asking £15 shipped for a practically new, but technically used one.