Stonewall J's is a gun and melee weapon shop in Grand Theft Auto: Vice City Stories. The store is located in Little Havana, and is just a short walk away from Sunshine Autos and Café Robina. The store is named after Stonewall Jackson, a Confederate general in the American Civil War. Keeping with the confederate theme, the shop is marked with a confederate flag on the radar, and throughout the store are confederate flags as well as the same mockery white-power banners found in the White Stallionz Bar. The clerk looks like a biker, but because of the previously mentioned banners he may in fact be associated with the White Stallionz. The store sells cheap weapons and guns, and is presumably in competition with Ammu-Nation.
The store exists in Grand Theft Auto: Vice City, but the building housing it is unnamed and inaccessable to the player.