A blue lower is a lower receiver for AR-15 or AR-10 rifles, finished in a blue color for a unique, custom appearance. It serves as the foundation for the fire control group, magazine well, and buffer system. The blue lower works with AR-15 or AR-10 upper receivers, lower parts kits, buffer tubes, stocks, magazines, and other standard components. It’s ideal for shooters seeking a personalized look while maintaining full compatibility and function with standard AR-platform parts.
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