The AR-15 platform's popularity stems partly from its customizable nature. One area frequently targeted for upgrades is the trigger group, with polishing often being the first step towards improved performance. This guide details the process of polishing an AR-15 trigger, focusing on achieving a smoother, lighter pull without compromising safety. Note: Always prioritize safety. Improper handling of firearms can lead to serious injury.
Understanding the Benefits of Trigger Polishing
Polishing your AR-15 trigger isn't just about aesthetics; it significantly impacts the shooting experience. A polished trigger offers several advantages:
- Reduced Friction: Polishing removes microscopic imperfections on the trigger components, reducing friction during the trigger pull. This results in a noticeably smoother action.
- Lighter Trigger Pull: While not directly reducing the trigger pull weight, polishing contributes to a lighter feel by minimizing friction. This can improve accuracy and speed.
- Improved Consistency: A smoother, more consistent trigger pull translates to greater accuracy and predictability, especially in rapid-fire situations.
- Enhanced Reliability: While not a primary function, a well-polished trigger can contribute to improved reliability by ensuring consistent function of all moving parts.
Tools and Materials You'll Need
Before you begin, gather the necessary tools and materials. Improper tools can damage components, so quality is essential.
- AR-15 Trigger Group: Disassembled and ready for polishing.
- Fine Grit Sandpaper (200-400 Grit): Start with a coarser grit and gradually move to finer grits for a smooth finish.
- Extra Fine Grit Sandpaper (600-1000 Grit): Used for the final polishing steps.
- Polishing Compound: A high-quality polishing compound is crucial for achieving a mirror-like finish. Look for compounds designed for metal.
- Micro-Mesh Polishing Pads: For the final polishing stages, achieving an incredibly smooth surface.
- Cleaning Solvent: To remove debris and residue after each sanding and polishing stage.
- Clean Rags or Microfiber Cloths: For wiping down components.
- Small Container: To hold the polishing compound.
- Safety Glasses: Protect your eyes from flying debris.
- Gloves: Protect your hands from chemicals and sharp edges.
- Non-metallic Tools: Use plastic or wooden tools to avoid scratching the metal surfaces.
- Gunsmithing Screw Driver: For proper torque when reassembling the trigger group.
Step-by-Step Polishing Process
This process is a careful progression through different grits of sandpaper and polishing compounds to achieve optimal smoothness:
1. Disassembly and Cleaning
Carefully disassemble the trigger group. Consult a reliable resource for detailed disassembly instructions specific to your trigger group model. Clean all components thoroughly with a cleaning solvent to remove any dirt, grease, or grime.
2. Sanding (200-400 Grit)
Starting with the coarser grit sandpaper, gently sand all interacting surfaces of the trigger components. Focus on areas where metal-on-metal contact occurs during trigger operation. Avoid sanding down sharp edges or critical surfaces beyond the minimal necessary to remove imperfections.
3. Intermediate Sanding (600-1000 Grit)
After the coarser sanding, switch to the finer grit sandpaper and repeat the process, aiming for an increasingly smooth finish. Always maintain even pressure to avoid introducing new imperfections.
4. Polishing
Apply a small amount of polishing compound to a clean rag. Gently polish each component, focusing on previously sanded surfaces. Use even circular motions to achieve a smooth and consistent finish.
5. Micro-Mesh Polishing
For an exceptional finish, use micro-mesh polishing pads, following the manufacturer's instructions for the sequence of grits. This will result in a superior level of smoothness.
6. Cleaning and Reassembly
Once polishing is complete, thoroughly clean all components to remove any remaining polishing compound residue. Carefully reassemble the trigger group, ensuring all parts are correctly installed and functioning smoothly.
Post-Polishing Testing and Considerations
After reassembly, test the trigger function. Ensure the trigger pull is smooth, consistent, and safe. Remember, polishing may reduce the trigger pull weight slightly but it shouldn't significantly alter the pre-travel or over-travel.
Important Disclaimer: Modifying firearms can affect their functionality and potentially void warranties. Always prioritize safety. Improper modifications can be dangerous. If you are uncomfortable with the process, seek the assistance of a qualified gunsmith. This guide provides information for educational purposes only.
