Combine chicken, apple cider vinegar, soy sauce, garlic, light brown sugar, peppercorns, red pepper, and bay leaves in a large ziploc bag; refrigerate for 2 hours.
Pour contents of bag into a large nonstick pan or a dutch oven; set over high heat and bring to a boil.
Reduce heat to a simmer, cover with a lid, and continue to cook for 30 minutes, turning the drumsticks half-way through cooking.
Preheat broiler.
Line a baking sheet with foil; transfer drumsticks to prepared baking sheet and broil for 4 minutes, or until chicken is browned.
In the meantime, increase heat to high and bring the remaining liquid in the pan to a boil.
Continue to cook for about 8 minutes, or until reduced to maple syrup consistency.
Remove chicken from broiler; transfer to a serving plate and pour the sauce over the chicken.
Serve over cooked rice and garnish with green onions.