What about ammo? Every round of ammunition is a "device from which a projectile or projectiles may be fired by an explosive such as gunpowder." Using an FFL transfer fee of $25 buying a box of 20 rounds would rack up $500 in transfer fees.
Hand your buddy an AR-15 with a loaded 30 round magazine at a lawful shooting area and you just broke the "law" 31 times.
A wise and frugal Government, which shall restrain men from injuring one another, shall leave them otherwise free to regulate their own pursuits of industry and improvement, and shall not take from the mouth of labor the bread it has earned. This is the sum of good government.- Thomas Jefferson March 4 1801
Provision for free medical attendance and nursing, for clothing, for food, for housing, for the education of children, and a hundred other matters, might with equal propriety be proposed as tending to relieve the employee of mental strain and worry. --- These matters obviously lie outside the orbit of congressional power. (Railroad Retirement Board v Alton Railroad)
Ammo is not a "device", with the exception of my own ammo.