B5 Systems Sierra K Receiver Extension OD Green

B5 Systems Sierra K Extension Features Constructed from high-strength aluminum this extension is lightweight yet built to endure rigorous use in both training and operational environments. The Olive Drab Green finish offers excellent visual compatibility with military-style setups while maintaining corrosion resistance and wear durability. Whether you re upgrading an SBR PDW or building from the ground up the Sierra K Receiver Extension delivers performance-driven reliability in a compact form. B5 Systems Sierra K Receiver Extension Specifications Manufacturer: B5 Systems Model: Sierra K Receiver Extension Fit: B5 Systems Sierra Stock Color: Olive Drab Green Material: High-strength aluminum Finish: Olive Drab Green coated (non-anodized) Application: AR-15 rifles and pistols configured for Sierra K stock compatibility