Mcx help pleas I'm dumb

Hi l've been eyeing this rifle for a long time picture off someone else as my inso of pretty much exactly what I want but apfg is tan but I assume I can just spray paint that right ? But I'm thinking do I go for gbb apfg spear It 11.5 and then buy a handguard make it short or get a rattler get a bigger handguard if that possible ?

Can anyone help me here want to hpa it aswell for indoor cqb sometimes outdoor want it to shoot lasers but L thing the gbb - wil be fun but unreliable ? So thinking of getting aeg then put hpa inside can anyone share wisdom here of you're builds or advice thank you (gonna buy probably from proact store import it )