I believe the agenda in question is here:
http://www.regulations.gov/#!documentDetail;D=DOJ-OAG-2015-0006-0001As for specific rules ...
http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201504&RIN=1140-AA23RIN: 1140-AA23
Title: Machine Guns, Destructive Devices, and Certain Other Firearms--Amended Definition of "Pistol"
Abstract:
This rule would propose to amend the regulations relating to machine guns, destructive devices, and certain other firearms
regulated under the National Firearms Act (NFA) for the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) to clarify the definition of the term "pistol" and to define more clearly exceptions to the "pistol" definition.
Not very informative, but searching for 1140-AA23 gets us a 2011 proposal under the same tag:
http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=201110&RIN=1140-AA23DOJ/ATF RIN: 1140-AA23 Publication ID: Fall 2011
Title: Machine Guns, Destructive Devices, and Certain Other Firearms--Amended Definition of "Pistol"
Abstract: The Department of Justice is proposing to amend the regulations relating to machine guns, destructive devices, and certain other firearms regulated under the National Firearms Act (NFA) for the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) to clarify the definition of the term "pistol" and to define more clearly exceptions to the "pistol" definition. The added language is necessary to clarify that certain weapons, including any weapon disguised to look like an item other than a firearm or any gun that fires more than one shot without manual reloading by a single function of the trigger, are not pistols and are classified as "any other weapon" under the NFA.
Not sure if that is identical or not.
Other interesting items:
1140-AA33
The Department of Justice is planning to propose to amend the regulations of the Bureau of Alcohol, Tobacco, Firearms, and Explosives to require licensed manufacturers and licensed importers to place identification markings on the outer tube of firearm silencers and firearm mufflers. The proposed regulations are intended to allow for identification markings to be placed conspicuously and legibly in one location providing consistency throughout the industry.
Seems targeted at things like oil filter adapters or suppressors whose serialized component is not the main tube. This has been done by some manufacturers so that if you do have a baffle strike you can have them replace the non-serialized components that were damaged as the serialized component cannot be replaced without applying for another tax stamp.
1140-AA10 - Relating to Secure Gun Storage
The Department of Justice is planning to propose to amend the regulations of the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) to implement certain provisions of Public Law 105-277, Omnibus Consolidated and Emergency Supplemental Appropriations Act, 1999. The amendments are with regard to: (1) certification by applicants for dealers' licenses that secure gun storage or safety devices will be available at any place where firearms are sold to nonlicensed individuals, and (2) amended definitions of certain terms, including an amended definition of "antique firearm," to include certain muzzle loading firearms
Seems to be mostly a dealer-specific regulation. Not real sure about the breadth of the second component.