[Nozzle NPAS]

Does anyone know if there is a NPAS that will fit inside a golden eagle nozzle 

 

or what upgrades I can do to a WA style GBBR 

[WA M4 GBBR parts/upgrades]

Hi guys 

 

just seeing if anyone can help me out, I just bought a WA M4 GBBR and was wondering what brand upgrade parts will fit inside as I can’t find WA parts any where 

cheers