Franklin Armory Rabbit Rounds 5.56x45mm BB Shot 20rd Box Franklin Armory Rabbit Rounds are 5.56x45mm rifle cartridges supplied in a 20-round box, with four lead BB projectiles in each cartridge. The multi-projectile design is intended for small-game hunting with a modern sporting rifle. The BB shot is carried in a thermoplastic sabot, with a copper gas check, giving Rabbit Rounds a projectile assembly that differs from a conventional single rifle bullet. Each projectile assembly weighs 45 grains and contains four .180-inch-diameter lead BBs. The assembly weight describes the complete projectile unit rather than the weight of one individual BB. The four-projectile count applies to each cartridge; it is separate from the 20 cartridges in the box. Franklin Armory describes the projectiles as spin-stabilized and identifies the ammunition as compatible with semi-automatic firearms. The 5.56x45mm caliber and BB-shot configuration identify the specialized rifle load, while the box quantity describes the purchase unit. Each box provides 20 complete cartridges. The 45-grain assembly weight and four-projectile design describe the load within each cartridge, so buyers can distinguish cartridge quantity from projectile quantity. Key Features Four BB projectiles: Each cartridge contains four lead BBs. Thermoplastic sabot: Carries the multi-projectile assembly. Copper gas check: Forms part of the projectile assembly. 20-round box: Contains 20 loaded rifle cartridges. Specifications Manufacturer: Franklin Armory Product: Rabbit Rounds Manufacturer Part Number: 21-01001-AMM Caliber: 5.56x45mm Projectile Type: BB shot; 4 projectiles per cartridge Projectile Diameter: .180 inch Projectile Material: Lead Projectile Assembly Weight: 45 grains Sabot Material: Thermoplastic Gas Check Material: Copper Box Quantity: 20 rounds Shop Franklin Armory Rabbit Rounds 5.56x45mm BB-shot ammunition in the 20-round box at BattleHawk Armory.