In Connecticut NFA weapons such as silencers, DD, SBS, and SBRs can be legally owned, as long as the owners follow the assault weapons provisions. This does not apply if the weapons were owned before October 1, 1993. Machine guns can be owned, as long as they do not select-fire. This does not apply to machine guns that were bought before October 1, 1993.
NFA weapons refer to a federal list of firearms that the government requires owners register. Not all states follow this law, and others have partial restrictions, full banns, or the need to register firearms in the NFA data base. Examples of firearms or other weaponry considered a NFA regulated weapon includes, but is not limited to: Machine guns, firearm suppressors, short barreled riffles and shot guns, and anti-tank guns (.50 caliber and up).