a) Occasional assembly of firearm parts and kits that do not require cutting, drilling, or machining;
b) Firearm repairs involving one-for-one drop-in replacement parts that do not require any cutting, drilling, or machining for installation;
c) Repairs involving replacement parts that do not improve the accuracy, caliber, or other aspects of firearm operation;
d) Hydrographic paint or Cerakote application or bluing treatments for a firearm;
e) Attachment of accessories to a completed firearm without drilling, cutting, or machining—such as attaching a scope, sling, or light to existing mounts or hooks, or attaching a flash suppressor, sound suppressor, muzzle brake, or similar item to a prethreaded muzzle;
f) Cosmetic additions and alterations (including engraving) that do not improve the accuracy, caliber, or other aspects of firearm operation beyond its original capabilities;
g) Machining new dovetails or drilling and tapping new holes for the installation of sights which do not improve the accuracy or operation of the firearm beyond its original capabilities; and
h) Manual loading or reloading of ammunition of .50 caliber or smaller.