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AR-15 Lower Parts Kits: Complete Guide for Builders and Enthusiasts When building or upgrading your AR-15, choosing the right AR-15 lower parts kit  (LPK) is critical to ensure optimal performance and reliability. The LPK consists of essential components that complete your lower receiver, such as the trigger assembly, safety selector, bolt catch, magazine catch, takedown pins, and various springs and detents. These small yet vital parts work together to facilitate the proper func …

When building or upgrading your AR-15, having the right AR-15 parts is crucial for performance and reliability. Our comprehensive blog on AR-15 Parts Kits breaks down everything you need about the various available kits, including Lower Parts Kits, Upper Parts Kits, and complete Rifle Build Kits. Whether assembling a lower receiver, fine-tuning the upper receiver, or seeking a complete rifle or pistol kit, each component significantly ensures your firearm operates smoothly and efficien …