The Noveske Bolt Assembly 556/300BLK is a dedicated AR-15 bolt built to deliver dependable cycling across popular intermediate calibers. Machined from proven Carpenter 158 steel and finished in a durable mil-spec phosphate, this bolt is engineered for shooters who want consistent performance in 5.56 NATO, .300 Blackout, and 22 Nosler builds. Each bolt is shot peened and magnetic particle inspected to help ensure long-term durability and reliable lockup under regular use.

This bolt assembly is an excellent choice for refreshing a well-used rifle, completing a new upper, or keeping a spare on hand for training days. Its compatibility with multiple calibers makes it especially useful for shooters who run several AR-15 configurations on a shared lower. With quality materials and careful inspection, this Noveske bolt supports smooth operation at the range, during training, or in general-purpose rifle roles, reflecting Noveske’s reputation for thoughtful design and precise manufacturing.

Key Features:

• Manufacturer: Noveske
• Model: 5.56/300BLK Bolt Assembly
• Caliber: 5.56 NATO / .300 Blackout / 22 Nosler
• Gun Model: AR-15
• Material: Carpenter 158 Steel
• Finish Color: Mil-Spec Phosphate
• Weight: 1.52 oz
• Unique Features: Shot Peened, Magnetic Particle Inspected, Small Bolt Carrier Compatible