Flagaway&reg; Two Point QD Sling w/ 16 Shells Shotgun w/ Quick Detach Snap Hook Mossberg 500 Remington 870 12 / 20 GA Ammo The two point sling helps you carry your weapon, while the shell holder allows you to have 16 shotgun shells ready when you need them Fully adjustable and holds 16 extra Shotgun shells (12 or 20 gauge) Attaches to standard sling swivels with durable steel spring hooks