Arsenal 5.56x45mm Bolt Head Assembly with Spring Loaded Firing Pin AK-558B

Arsenal 5.56x45mm Bolt Head Assembly AK-558B Arsenal 5.56x45mm Bolt Head Assembly with Spring Loaded Firing Pin AK-558B The Arsenal 5.56x45mm Bolt Head Assembly with Spring Loaded Firing Pin (Model AK-558B) is a high-quality factory replacement bolt head designed specifically for 5.56x45mm (.223 Remington) AK-pattern rifles. This complete bolt head assembly includes a spring-loaded firing pin, providing reliable ignition and smooth operation. Manufactured by Arsenal, the AK-558B delivers the precision, durability, and fitment required for professional-grade 5.56x45mm AK builds and repairs. Complete Bolt Head Assembly for 5.56x45mm AK Rifles The AK-558B is a ready-to-install bolt head assembly that includes the bolt head and a spring-loaded firing pin. This design ensures consistent firing pin protrusion and reliable primer ignition across a wide range of ammunition. The assembly is engineered to work with standard 5.56x45mm AK bolt carriers, making it an essential component for builders working on 5.56x45mm AK variants. Key Features of the Arsenal AK-558B Bolt Head Assembly Model: AK-558B Caliber: 5.56x45mm / .223 Remington Includes: Bolt Head and Spring Loaded Firing Pin Compatibility: 5.56x45mm AK-Pattern Bolt Carriers Features: Precision Machined, Spring-Loaded Firing Pin, Durable Steel Construction Best Use: Custom 5.56 AK Builds, Replacement Part, Maintenance Spring Loaded Firing Pin for Reliable Ignition The spring-loaded firing pin included in the AK-558B helps ensure consistent and reliable primer strikes. The spring mechanism returns the firing pin to its rearward position after each shot, reducing the risk of slam fires and improving overall safety and function. This feature is especially beneficial in semi-automatic 5.56x45mm AK rifles where reliable ignition is critical. Specification Details Brand Arsenal Product Bolt Head Assembly Model Number AK-558B Caliber 5.56x45mm Compatibility 5.56x45mm AK Bolt Carriers Includes Bolt Head + Spring Loaded Firing Pin Best Use Custom Builds & Replacement Why Choose the Arsenal AK-558B Bolt Head Assembly? The Arsenal 5.56x45mm Bolt Head Assembly with Spring Loaded Firing Pin AK-558B is the preferred choice for builders and gunsmiths working on 5.56x45mm AK rifles. This factory-assembled unit ensures proper alignment and function of the firing pin, helping to maintain reliable ignition and safe operation. Whether you are building a new 5.56x45mm AK, replacing a worn bolt head, or upgrading your current setup, the AK-558B provides the quality, precision, and reliability that Arsenal is known for. Build or maintain your 5.56x45mm AK with confidence. The Arsenal Bolt Head Assembly AK-558B offers factory precision and reliable performance. The End