National Firearms Act offencesPossibly — unconfirmed

§ 5861 / § 5871 — NFA prohibited acts (unregistered manufacture / dealing, possession of unregistered or unserialised firearms, unlawful transfers, making, obliterating serial numbers)Possibly — unconfirmed

Imprisonment

0 (no mandatory prison) – 10 years

Fine

Fine $0–$10,000 (but see § 3571: felony cap $250,000 individual / $500,000 organisation, if greater)

0 = the law sets no minimum prison term. The court is not required to impose prison. Depending on the offence, jurisdiction, and case, it may instead impose a non-custodial sentence — e.g. a suspended sentence, community order / probation, a fine, or a discharge.

Each prohibited act is a separate offence; forfeiture of the firearm also applies.