Airsoft Barrel/Handguard Change

[Mario]

If I change my handguard and barrel do I need a new nozzle or like anything new in my gun?

[Nick G]

Are you changing the outer barrel ? But no, you shouldn't need to change any internal parts. Even if you change the inner you wont need to change anything else, however it is generally worthwhile changing the hop rubber if you've got the thing in pieces .