Building your own AR-9 pistol or rifle can be a rewarding experience, offering customization and potential cost savings compared to buying a complete firearm. This guide focuses on the "AR-9 Kit Minus Lower," explaining what it is, what's included, and what you'll need to complete your build.
Understanding the AR-9 Kit Minus Lower
An AR-9 kit minus lower is essentially all the parts you need to assemble a 9mm AR-15 style firearm except the lower receiver. The lower receiver is the serialized part of the firearm, subject to all relevant federal and state regulations. Because of this, it's usually sold separately. This setup allows builders to choose a lower receiver that best suits their needs and preferences, whether it's a pistol lower, braced pistol lower, or a standard rifle lower.
What's Typically Included in an AR-9 Kit Minus Lower?
The specific components vary slightly between manufacturers, but a typical kit will include the following:
- Upper Receiver: Houses the bolt carrier group and barrel. Often comes with a forward assist and ejection port cover.
- Bolt Carrier Group (BCG): The heart of the 9mm system, this reciprocates to cycle the action. Specifically designed for 9mm, unlike the standard .223/5.56 BCG.
- Barrel: The barrel dictates the overall length and accuracy of the firearm. Lengths vary widely, from short pistol barrels to longer carbine lengths.
- Charging Handle: Used to manually cycle the BCG.
- Handguard: Protects the barrel and provides a place to attach accessories like lights or lasers. Material options include aluminum, polymer, and M-LOK compatible rails.
- Gas Block and Tube (if applicable): For blowback systems, these are not needed. Direct impingement or short-stroke piston systems will include these parts.
- Buffer Tube and Spring (if applicable): Necessary for the function of the firearm. Some kits might be designed for different buffer setups.
- Other Small Parts: Pins, springs, and other necessary hardware to complete the build.
What You'll Need to Complete Your Build
Besides the AR-9 kit minus lower, you'll also need:
- Lower Receiver: Remember, this is the serialized part of the firearm and must be purchased separately. Choose a lower that complies with your local and state laws.
- Magazines: 9mm AR-15 magazines are readily available, but compatibility can vary slightly depending on the manufacturer of your lower receiver.
- Tools: You'll need an AR-15 armorer's wrench, a punch set, and possibly a vice block to assemble the components.
Choosing the Right AR-9 Kit Minus Lower
Several factors influence your decision when purchasing an AR-9 kit minus lower:
- Budget: Kits range in price significantly depending on the included components' quality and brand.
- Intended Use: Are you building a pistol, a rifle, or something else? This choice dictates the lower receiver and barrel length you'll need.
- Desired Features: Consider features like the handguard material, barrel length, and the type of BCG.
Safety First!
Always prioritize safety when assembling and handling firearms. Familiarize yourself with all relevant safety regulations and laws before beginning your build. Consider seeking guidance from an experienced gunsmith if you lack experience with firearm assembly. Improper assembly can lead to malfunctions and potential injury.
This guide provides a comprehensive overview of AR-9 kits minus lower. Remember to consult relevant laws and regulations in your area before proceeding with any firearm build. Building your own AR-9 can be a fun and educational project, but always prioritize safety and responsible gun ownership.
