Sure, but none of which pertain to the firearm being discussed.
Below is the ATF clarification letter, as it relates to the differentiation of a Gatling Gun and a M-134 or GAU "Minigun", but it better illustrates my point..
https://www.atf.gov/file/83561/download
ATF and its predecessor agency, the Internal Revenue Service (IRS), have historically held that the original, crank-operated Gatling Gun, and replicas thereof, are not automatic firearms or machineguns as defined. See Rev. Rul. 55-528, 1955-2 C.B. 482. The original Gatling Gun is a rapid-firing, hand-operated weapon. The rate of fire is regulated by the rapidity of the hand-cranking movement, manually controlled by the operator. It is not a "machine gun" as that term is defined in 26 U.S.C. 5845(b} because it is not a weapon that fires automatically.
The Minigun is not a Gatling Gun. It was not produced under the 1862 - 1893 patents of the original Gatling Gun. While using a basic design concept of the Gatling Gun, the Minigun does not incorporate any of Gatling's original components and its feed mechanisms are entirely different. Critically, the Minigun shoots more than one shot, without manual reloading, by a single function of the trigger, as prescribed by 26 U.S.C. 5845(b}. See United States v. Fleischli, 305 F.3d 643, 655-656 (7th Cir. 2002). See also Staples v. United States, 511 U.S. 600,603 (1994) (automatic refers to a weapon that "once its trigger is depressed, the weapon will automatically continue to fire until its trigger is released or the ammunition is exhausted"); GEORGE C. NONTE, JR., FIREARMS ENCYCLOPEDIA 13 (Harper & Rowe 1973) (the term "automatic" is defined to include "any firearm in which a single pull and continuous pressure upon the trigger (or other firing device) will produce rapid discharge of successive shots so long as ammunition remains in the magazine or feed device - in other words, a machinegun"}:WEBSTER'S II NEW RIVERSIDE-UNIVERSITY DICTIONARY (1988) (defining automatically as "acting or operating in a manner essentially independent of external influence or control"}; JOHN QUICK, PH.D., DICTIONARY OF WEAPONS AND MILITARY TERMS 40 (McGraw-Hill 1973) (defining automatic fire as "continuous fire from an automatic gun, lasting until pressure on the trigger is released").