The reported, or estimated value of small arms and corresponding parts and ammunition exports according to national customs data. These figures are commonly sourced from UN COMTRADE (international customs) data, which can be accessed here: https://comtrade.un.org/data/

As this data is based on the Harmonized Commodity Description and Coding System (HS), the following HS commodity codes have been deemed relevant:

Small arms
-930190 (military firearms)
-930200 (pistols and revolvers)
-930320 (sporting and hunting shotguns)
-930330 (sporting and hunting rifles)

Parts and accessories
-930510 (of revolvers and pistols)
-930520 (of shotguns and rifles)

Ammunition
-930621 (shotgun cartridges )
-930629 (parts of shotgun cartridges)
-930630 (cartridges)

Some countries disaggregate firearms imported or exported for law enforcement, military or other official use. In countries where legislation defines an imitation firearm, airgun, paintball gun, BB gun, gas gun or similar as a firearm, such imports or exports can be counted separately in Customs data.

Where import or export figures are tallied from harmonised trade commodity codes to provide a count of modern, non-air firearms for civilian use, the following categories are commonly excluded from such a count: Military, Law Enforcement, Airgun, BB gun, Paintball gun, Gas gun, Imitation firearm, Captive-bolt gun, Muzzle-loader, Antique, Deactivated and Other.