MSR Firing Pin Spring 5.56x45mm for Spring-Loaded Bolt Head

Ensure reliable primer ignition and consistent performance in your 5.56x45mm AK-pattern rifle with the MSR Spring for 5.56x45 firing pin. Designed specifically for spring-loaded bolt heads, this precision replacement component restores proper firing pin function, helping maintain the smooth operation critical for tactical and sporting applications. Key Features Exact OEM-spec replacement engineered for 5.56x45mm spring-loaded bolt head assemblies Compact, lightweight construction measuring just 0.65 inches in length with a 0.08-inch diameter High-quality spring steel for durable tension and resistance to fatigue under repeated cycling Direct fit for Arsenal and compatible AK variants requiring this firing pin spring configuration Benefits for Shooters A worn or weakened firing pin spring can lead to inconsistent strikes, light primer hits, or failure to reset properly. This spring restores factory-level tension, promoting reliable ignition across a wide range of 5.56x45 ammunition while supporting the longevity of your bolt carrier group. Its minimal size and weight make it an essential spare for field maintenance kits without adding bulk. Specifications SKU: 35106 Weight: 0.01 lbs Length: 0.65 in Width: 0.08 in Height: 0.08 in Compatibility: 5.56x45mm firearms with spring-loaded bolt heads (Arsenal AK series and equivalents) Why Choose This Product Precision-engineered as a direct replacement, this firing pin spring delivers the exact performance characteristics needed for dependable operation. Whether you're building, repairing, or maintaining your 5.56 platform, it addresses common wear issues that affect ignition reliability, giving you confidence in every trigger pull. Installation Note Professional installation or consultation with a qualified gunsmith is recommended for proper fitment and function testing.