(43)"repair" of firearm may be minor or major -'minor repair' includes -(i)cleaning and carrying out re-finishing, fixing slings, recoil pads, installation of pre-fabricated stock, general accessories, preservative packaging and ensuring accuracy or safe working of the firearm and its components;(ii)fabricating or replacing or working on old, damaged, worn-out, eroded, shot-out part of a firearm (excluding barrels or receivers or frames or breech bodies or bolts) for the purpose of repair and safe functioning;(iii)making and replacing stocks, grips (butt stock) and other parts;(iv)ensuring accuracy or safe working of the firearm by means of carrying out work on complete barreled action, fabricating, fitting or adjusting optics, sights, other components, etc., including test firing;(v)making and installing accessories and tuning fabricated parts.'major repair' requires extensive primary and secondary machining operations of critical parts and includes -(i)working on critical parts including fabrication of components like barrels and actions (re-boring or re-chambering or replacing or remaking barrels, re-machining of receivers or frames, bolts, slides, cylinders, breech, etc. and other components) for the purpose of repair or conversion;(ii)shortening, conversion, working on triggers, safeties and general safety testing of firearms and devices including firing or testing of firearms repaired or converted.
