The nail gun-wielding enforcer for the Stanfield Organization is Snoop.
Snoop, whose real name is Felicia Pearson, is one of Marlo Stanfield’s most feared soldiers in HBO’s The Wire. She works closely with Chris Partlow and becomes associated with the organization’s especially brutal method of hiding murder victims inside abandoned row houses.
The nail gun is introduced in the season-four premiere, “Boys of Summer.” Snoop purchases a powerful powder-actuated nail gun, and she and Chris use it to seal doors after placing bodies inside vacant homes. The tool later becomes an important clue for the Major Crimes Unit, helping investigators connect multiple killings.
A common mix-up is Chris Partlow: he is the Stanfield Organization’s chief enforcer and Snoop’s mentor, but Snoop is the character specifically linked to the nail gun. Cheese and Slim Charles belong primarily to other factions and are not the canonical answer to this clue.