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

HB 5436 would add major firearm components to the CGS 53a-3 firearm definition. Requirements that use that definition would apply to those components, subject to each statute's scope and exceptions.

- 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
- Sale and transfer rules that use the CGS 53a-3 firearm definition would apply to components, subject to their scope and exceptions

Grandfathered Transfer Provision

HB 5436 also proposes transfers of declared large-capacity magazines between specified authorized possessors and transfers of registered assault weapons through licensed dealers to people who already hold a certificate of possession for another assault weapon ^[1]. Under current law, declared large-capacity magazines and assault weapons covered by a certificate of possession may be retained under statutory conditions. Both laws already allow transfers by bequest or intestate succession. 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). The OLR Bill Tracking Report identifies section 3 of HB5436 as incorporated into section 2 of Public Act 26-41, effective October 1, 2026. That enacted section updates the rate-of-fire enhancement definition, rather than enacting all of HB5436. Official bill-tracking report Public Act 26-41 NRA-ILA's state director submitted testimony opposing the bill ^[2].

What This Means

If enacted, a replacement barrel or slide classified as a long gun under the expanded firearm definition would be subject to long-gun transfer rules, including eligibility checks and applicable exceptions. The official bill-tracking report identifies the rate-of-fire enhancement portion as incorporated into Public Act 26-41. That does not establish enactment of the proposed background-check or transfer requirements for every replacement part. Official bill-tracking report