Preheat grill or oven to medium-high heat (400°F).

In a bowl, combine ground beef with salt and pepper; form into 6 small patties with an indentation in the center.

Grill patties for about 4-5 minutes per side until they reach an internal temperature of at least 160°F.

Add cheddar on top of each patty during the last minute of cooking until melted.

Assemble sliders by spreading barbecue sauce on each bun half, placing a patty on the bottom half, and topping with pickles. Cap with the top bun.