Building your own AR-15 pistol or rifle from an 80% lower receiver can be a rewarding experience, offering customization and a deeper understanding of your firearm. However, accurately drilling the necessary holes for the fire control group is crucial. This is where a drill press 80% lower jig becomes indispensable. This guide will explore the world of drill press jigs for 80% lowers, focusing on their benefits, selection, and proper usage.
Why Use a Drill Press 80% Lower Jig?
Attempting to drill the 80% lower receiver without a jig is extremely risky. Inaccurate drilling can render the receiver unusable, leading to wasted time, materials, and potentially, a dangerous firearm. A good jig ensures:
- Precision: Jigs provide accurate hole placement, guaranteeing proper functionality of the finished receiver.
- Safety: By guiding the drill bit, the jig minimizes the risk of damage to the receiver or injury to the user.
- Efficiency: A jig simplifies the process, making it faster and easier for both beginners and experienced builders.
- Consistency: Repeated accuracy is vital. A jig ensures every receiver is drilled to the same precise standards.
Choosing the Right Drill Press 80% Lower Jig
The market offers a variety of drill press jigs, each with its own features and price point. When choosing, consider these factors:
- Material: Look for jigs made from durable materials like hardened steel or aluminum, capable of withstanding the forces of drilling.
- Compatibility: Ensure the jig is compatible with your specific 80% lower receiver model. Some jigs are designed for specific brands or receiver types.
- Ease of Use: Choose a jig with a clear, user-friendly design that simplifies the setup and drilling process. Look for features like easy-to-follow instructions and clearly marked drill bit guides.
- Features: Some jigs offer additional features like built-in countersinking tools or alignment pins, enhancing the overall building experience.
- Reviews: Before purchasing, thoroughly research the jig and read reviews from other users. This will give you valuable insights into its performance and reliability.
Using Your Drill Press 80% Lower Jig: A Step-by-Step Guide
While specific instructions vary depending on the jig model, the general process involves these steps:
- Secure the Jig: Properly clamp the jig to your workbench or drill press table, ensuring stability throughout the drilling process.
- Install the Lower: Carefully position your 80% lower receiver into the jig, ensuring it’s securely held and aligned correctly. Double-check the alignment before proceeding.
- Select the Drill Bit: Use the drill bits specified by the jig manufacturer. Using the wrong size or type of bit can lead to inaccuracies and damage.
- Drill the Holes: Slowly and carefully drill each hole, maintaining even pressure and speed. Avoid forcing the drill bit.
- Deburr and Clean: Once drilling is complete, deburr the holes and clean any metal shavings from the receiver.
Beyond the Jig: Essential Tools and Safety Precautions
Beyond the jig itself, you'll need additional tools and should prioritize safety:
- Drill Press: A sturdy drill press with variable speed control is essential for accurate and controlled drilling.
- Drill Bits: The correct size and type of drill bits are critical.
- Safety Glasses: Always wear appropriate safety glasses to protect your eyes from flying debris.
- Hearing Protection: Drilling can be loud, so hearing protection is recommended.
- Work Gloves: Gloves provide protection and improve grip.
Building an AR-15 from an 80% lower requires precision and attention to detail. Investing in a high-quality drill press 80% lower jig and following safe practices is vital to ensure a successful and safe build. Remember to always consult the manufacturer's instructions for your specific jig and receiver. Happy building!
