The lightest pumps were that I know of were for the Brocock cartridgesJanuary 10 2018 at 12:09 PM
David Enoch (Login DavidEnoch)
Response to light/smallest hand pump
Brocock cartridges looked like a firearm round with a case and bullet. However, the case was an individual air tank and valve. A pellet was inserted and then the cartridge was pumped up and loaded into the gun similar to a firearm. The cartridges tended to leak and there were some legality issues with them in Europe/England.