Luna's Howl is a pinnacle weapon obtainable in the Forsaken expansion with a demanding requirement for acquisition.

--Legal Notice--
*This is not an officially licensed product and is only considered FAN ART

§272.2 Prohibitions.
No person shall manufacture, enter into commerce, ship, transport, or receive any toy, look-alike, or imitation firearm (“device”) covered by this part as set forth in §272.1 unless such device contains, or has affixed to it, one of the markings set forth in §272.3, or unless this prohibition has been waived by §272.4.
[78 FR 4765, Jan. 23, 2013]

§272.3 Approved markings.
The following markings are approved by the Secretary of Commerce:

(a) A blaze orange (Fed-Std-595B 12199) or orange color brighter than that specified by the federal standard color number, solid plug permanently affixed to the muzzle end of the barrel as an integral part of the entire device and recessed no more than 6 millimeters from the muzzle end of the barrel.
...
[54 FR 19358, May 5, 1989, as amended at 57 FR 48454, Oct. 26, 1992; 69 FR 18803, Apr. 9, 2004. Redesignated and amended at 78 FR 4765, Jan. 23, 2013]