Lee Breech Lock 3-Die Set .300 AAC Blackout. Specifications for Lee .300 AAC Blackout Breech Lock 3-Die Set: Manufacturer: Lee Caliber: .300 AAC Blackout Height: 1.5 in Gun Type: Rifle Included Accessories: 3 Dies in a Set Features of Lee .300 AAC Blackout Breech Lock 3-Die Set Colored spline drive breech bushings for easy die identification Full Length Sizing Die Bullet Seating Die Factory Crimp Die Universal Shell Holder Powder Dipper and Instructions/Load Data Package Contents: Lee .300 AAC Blackout Breech Lock 3-Die Set Lee 91925: Breech Lock 3-Die Set .300 AAC Blackout