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Choosing a high-quality  AR-15 lower parts kit (LPK) is critical for anyone building or upgrading their rifle. With many options available, it’s essential to understand what to look for and how each component affects the firearm’s performance, reliability, and longevity. A solid LPK can differentiate between smooth, dependable operation and frustrating malfunctions or safety issues. In this guide, we’ll explain everything you need to know about picking the right lower parts kit for you …

This how-to guide assists in installing an AR-15 lower parts kit, also known as an LPK, providing the necessary steps and tools for a successful assembly. An AR-15 lower parts kit is a collection of essential components needed to complete the lower receiver of an AR-15 rifle. These kits typically include the trigger assembly, safety selector, magazine release, bolt catch, and various pins and springs. The lower receiver houses the trigger mechanism and magazine well, making its assembly cru …