Take a look at the electronic Code of Federal Regulations Title 15: Commerce and Foreign Trade PART 1150—MARKING OF TOY, LOOK-ALIKE AND IMITATION FIREARMS You'll see that the requirement that the muzzle of the gun be tipped by blaze orange does not apply to (I quote the regulation) "... pellet-firing air guns that expel a projectile through the force of compressed air, compressed gas or mechanical spring action, or any combination thereof, ..." It would appear that not only is the claim that the pellet firing gun can be converted to a (perish the thought) dastardly Machine Gun, but neither the BATFU's nor the DHS know their regulations they seem to think "We The People" are required to submit to.