I am somewhat of a firearms historian. Used to shoot lots of black powder firearms. Completed two by my own hand and used them frequently - 1803 Harper's Ferry Rifle [an experimental rifle on the Lewis/Clark Voyage of Discovery] .54 cal. Also finished a .45 cal. flintlock pistol from that same era. Shot good too. After reading through all of the nauseating arguments that the 2A was never meant to include military firearms. I dug out some books and I believe I can make the argument that the Assault Rifle of its day was the flintlock smooth bore .75cal Brown Bess musket [and its many variants]. Yes it was used by British troops from Pre-Revolutionary times until about 1830. From what I could discover everybody who was anybody, civilian and military, owned one of these. When the 2A was written, apart from the American Longrifle, these were the prevailing fire arm used by just about everybody. The 2A is specifically about military weapons' use in defense situations. Preaching to the choir here I know. I just found this of historical interest.