In a small saucepan over medium heat, combine the barbecue sauce, cider vinegar, chili powder, garlic powder, and ground allspice.
Bring the sauce to a simmer, cooking for about 3 minutes or until slightly thickened, stirring occasionally to prevent burning.
Add the shredded chicken to the sauce mixture, stirring until well combined. Cook for an additional 2 minutes or until the chicken is heated through.
Spoon about 3 tablespoons of the chicken mixture onto the bottom half of each slider bun.
Top each slider with a dollop of coleslaw, if desired, and cover with the top half of the bun.
Serve immediately and enjoy these irresistible barbecue pulled chicken sliders!