HB 5436 (2026): Redefining Firearm Components as Firearms

HB 5436, introduced in the 2026 General Assembly session, would redefine basic firearm components -- barrels, slides, cylinders, frames, and receivers -- as "firearms" under Connecticut law ^[1].

What the Bill Would Change

Under current Connecticut law, only complete firearms are subject to background check, storage, sale, and transfer requirements. HB 5436 would extend these requirements to individual components, meaning:

- Background checks would be required to purchase a barrel, slide, cylinder, frame, or receiver
- Storage requirements under Ethan's Law (CGS 29-37i) would apply to individual components
- All sale and transfer regulations applicable to firearms would apply to components

Grandfathered Transfer Provision

Notably, HB 5436 also contains a provision that would allow legal transfer of grandfathered large-capacity magazines and pre-ban assault weapons between eligible persons ^[1]. Under current law, these items may be possessed by their original registrant but cannot be transferred to anyone else, even between family members. This provision would create a limited transfer pathway for registered items.

Current Status

The bill had a public hearing on March 11, 2026, alongside HB 5043 (the convertible pistol ban). It remains in the Judiciary Committee as of April 2026. Gun rights organizations have opposed the bill, arguing that treating common replacement parts as regulated firearms creates an unreasonable burden on lawful gun owners ^[2].

What This Means

If enacted, purchasing a replacement barrel or slide for your pistol would require the same background check and waiting period as buying a new firearm. The bill has not yet passed committee, and its final form may differ from the introduced version.