WMDs 5.56 Bolt Assembly-Optimized for performance. The bolt was engineered for NiB-X nickel boron coating to provide long life, ease of cleaning and superior locking and unlocking action with barrel extensions.

Features :

• 5.56 NATO/223 Remington
• NiB-X Coating
• Case Hardened 9310
• Magnetic Particle Inspected
• High-Performance Extractor