G&g cm16 internal upgrades

[scapula]

New player. Looking to upgrade my g&g cm16 raider L aeg with v2 gearbox

I have bought these upgrades
Systema ENERGY Piston Head with Bearing
Systema NEW Aero Cylinder Head Ver.Ⅱ
Deep Fire Air Nozzle for M4 Series

But the nozzle wont fit the cylinder head and the cylinder head wont fit my stock g&g cylinder. Please advice on this. Shpuld i buy systema cylinder head type 4 to fit with my cylinder head?

Please help on what things to buy to upgrade my gun.
I want to start upgrading with the cylinder head,nozzle,piston head, gears (bought shs 16:1 gears), piston (bought 15 steel tooth piston) to achieve more fps so i will upgrade the spring last and motor.


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