Rocket Airsoft CNC Aluminum Airsoft AEG Gearbox Cylinder Head w/ Double O-ring & Pad

"Seals very well, im using an m160 spring and have no issues. Fits my nozzle and cylinder perfectly. Been using for about 10k rounds and the rubber pad is still in good shape.

"Really good cylinder head. Seals good in a lot of cylinders that I’ve put it in. I’ve gotten best results from Lonex cylinders, though I’ve found Lonex cylinders to have tighter tolerances than a lot of other. I used to use Lonex cylinder heads but these Rocket ones have better fitment and are cheaper. The best V2 cylinder head you can get.