Like his twin brother, Buck, Chuck is tall and has a well muscled body. While muscles aren't bad in themselves, his habitual smirking scowl makes him look like the textbook example of a violent bully. The identical twins are the creators of the Dunton-brand meat jerky, made with a variety of ingredients, including rotten meat and boot scrapings.
The Duntons hang out at their shop at day and frequent the Golden Gecko at night. Their usual pass times include arm wrestling and drinking, with brahmin rustling occupying most of their working day. The Buckners are their usual prey.
Duntons' script checks whether they have the spiked knuckles in inventory whenever combat is initiated. If not, it spawns one in their inventory. This can be abused to farm them for spiked knuckles, by stealing them, entering combat, then stealing the newly spawned knuckles again.
Originally, the player was supposed to be able to expose them with the radscorpionlimbs found in a shack on the brahmin pastures map, but this feature was cut from the final game.