The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) recently examined devices commonly marketed as “solvent traps” and has determined that some of them are “firearm silencers” as defined in the Gun Control Act (GCA) and as defined in the National Firearms Act (NFA).

The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) is issuing this open letter to further assist the firearms industry and the public in understanding whether a “partially complete, disassembled, or nonfunctional” receiver of an AR-15/M-16 variant weapon has reached a stage of manufacture such that it “may readily be completed, assembled, restored, or otherwise converted” to a functional receiver, and is therefore classified as a “frame or receiver” or “firearm” in accordance with the final rule titled “Definition of ‘Frame or Receiver’ and Identification of Firearms (Final Rule 2021R-05F), which became effective August 24, 2022.

Letter to all federal firearms licensees (FFLs) in response to questions from industry members regarding the legality of firearm sales and deliveries exterior to the brick-and-mortar structure at which the firearms business is licensed, in light of the March 13, 2020, declaration of a national emergency concerning the outbreak of the novel coronavirus disease (COVID-19), and the Department of Homeland Security’s subsequent classification of firearms businesses as essential.