Remington 870 'chuk chuk' sound


When you load a cartridge in the Remington 870 (a famous shotgun), there is a sound heard. Not so for many others guns, and I really like hearing a sound, it gives substance to the weapon, and the world in general.

Anybody can tell me how to expand that for others weapons?

A full update/overhaul to onomatopoeia in this game would actually be really niceā€¦