Building or assembling your own AR-15 rifle can be a rewarding experience, offering a level of customization unavailable with pre-built rifles. A crucial component in this process is the AR-15 lower parts kit. This guide provides a comprehensive overview of these kits, what they contain, factors to consider when choosing one, and best practices for assembly.
What is an AR-15 Lower Parts Kit?
An AR-15 lower parts kit contains all the essential components needed to complete the lower receiver of your AR-15 rifle. The lower receiver is the firearm's serialized part, and legally constitutes the firearm itself. The lower parts kit does not include the lower receiver; you must purchase that separately and legally. This kit essentially brings the lower receiver to life, enabling the functionality of the weapon.
Key Components Included in Most Kits:
- Hammer: Strikes the firing pin, igniting the cartridge.
- Hammer Pin: Securely holds the hammer in place.
- Trigger: Initiates the firing sequence when pressed.
- Trigger Pin: Holds the trigger and disconnector in place.
- Disconnector: Prevents automatic firing.
- Safety Selector: Controls the firearm's firing capability (safe, semi-auto).
- Safety Selector Detent: Holds the safety selector in place.
- Safety Selector Spring: Returns the safety selector to its neutral position.
- Bolt Catch: Locks the bolt open after the last round is fired.
- Bolt Catch Pin: Secures the bolt catch.
- Bolt Release: Manually releases the bolt.
- Magazine Catch: Holds the magazine in place.
- Magazine Catch Button: Releases the magazine.
- Grip Screw: Secures the pistol grip.
- Buffer Retainer Pin: Holds the buffer retainer in place.
- Takedown Pins: Allow for easy disassembly of the upper and lower receivers.
Note: Some kits may include additional components like enhanced trigger components or different types of grip screws. Always verify the contents of the kit before purchasing.
Choosing the Right AR-15 Lower Parts Kit: Factors to Consider
The market offers a wide range of AR-15 lower parts kits, varying in quality, features, and price. Making the right choice depends on several key factors:
1. Budget:
Kits range from budget-friendly options to high-end sets with enhanced components. Determine your budget beforehand to narrow down your choices.
2. Material and Finish:
Lower parts kits are typically made from steel, aluminum, or a combination of both. Steel is generally more durable but heavier, while aluminum is lighter but may be less robust. The finish (e.g., hard-coat anodized, parkerized) affects corrosion resistance and overall durability.
3. Brand Reputation:
Choose kits from reputable manufacturers with a history of producing high-quality components. Research reviews and compare different brands before making a decision.
4. Intended Use:
Consider the intended purpose of your AR-15. For casual shooting, a standard kit will suffice. However, if you plan on rigorous use or competition, you might consider a kit with enhanced components for improved performance and reliability.
Assembly and Best Practices:
Assembling an AR-15 lower receiver requires careful attention to detail. While many resources exist online detailing the steps, it is crucial to follow the instructions provided with your specific kit and to consult with experienced gunsmiths or enthusiasts if needed. Safety is paramount; improperly assembled firearms can be extremely dangerous.
Conclusion:
The AR-15 lower parts kit is a fundamental component in building or completing your AR-15 rifle. By carefully considering the factors discussed above and choosing a high-quality kit, you can ensure the reliable and safe operation of your firearm. Remember to always prioritize safety and handle firearms responsibly. This guide provides a solid foundation for understanding AR-15 lower parts kits, however, further research and consultation with experts is always recommended before undertaking any firearm assembly.
