The Birchwood Casey Duracap Dummy Round are CNC machined from solid aluminum and hard anodized for smooth functioning. The durable rubber firing pin impact buffer prevents damage to your firearm.Features : CNC Machined From Solid Aluminum Hard Anodized For Smooth Functioning Durable Rubber Firing Pin Impact Buffer Protects Firing Pin From Damage Precision Dimensions For Reliable Performance Laser-Marked For Easy Identification Ideal For Safety Training, Function Testing, And Storage