The Geissele Super Semi-Automatic (G2S) trigger is a popular upgrade for AR-15 platforms, renowned for its crisp break and short reset. Installing it, however, requires precision and a good understanding of firearm mechanics. This guide provides a step-by-step walkthrough, ensuring a smooth and safe installation process. Always prioritize safety and consult a qualified gunsmith if you are unsure about any step.
Tools and Materials You'll Need
Before you begin, gather the necessary tools and materials. Having everything readily available prevents interruptions and ensures a clean installation. You'll need:
- Geissele G2S Trigger Assembly: This includes the trigger, hammer, and disconnector.
- AR-15 Lower Receiver: Ensure it's empty and unloaded. Double-check!
- Punch Set: Including a roll pin punch and a standard punch (sizes may vary depending on your specific lower receiver).
- Hammer: A standard ball-peen hammer will suffice. Avoid using excessive force.
- Small Screwdriver: Possibly needed for certain lower receivers to remove any retaining screws.
- Dental Pick or Similar Tool: Helpful for cleaning and maneuvering small parts.
- Gunsmithing Mat or Clean Work Surface: Protects your parts and provides a clean workspace.
- Safety Glasses: Always protect your eyes!
Step-by-Step Installation
Disclaimer: This guide provides general instructions. Variations may exist depending on your specific lower receiver. Always refer to the manufacturer's instructions included with your Geissele G2S trigger for the most accurate and up-to-date guidance.
1. Disassemble the Lower Receiver:
- Completely unload the firearm and visually inspect it to confirm it's clear.
- Remove the magazine, bolt carrier group (BCG), and charging handle.
- Depress the trigger and safety selector to confirm it’s disengaged.
2. Remove the Existing Trigger and Hammer Pins:
- Using the roll pin punch and hammer, carefully remove the trigger pin. Support the lower receiver to prevent damage.
- Repeat this process to remove the hammer pin.
3. Remove the Old Trigger Assembly:
- Once the pins are out, the old trigger assembly (trigger, hammer, and disconnector) should come out. If it's stuck, gently tap it out with a punch, avoiding damaging any components.
4. Install the Geissele G2S Trigger Assembly:
- Carefully insert the new Geissele G2S trigger, hammer, and disconnector assembly into the lower receiver, ensuring proper orientation. Refer to the Geissele instructions or diagrams if unsure.
5. Reinsert the Hammer Pin:
- Insert the hammer pin through the appropriate holes. This often requires a gentle tap from the hammer. Ensure the pin is fully seated.
6. Reinsert the Trigger Pin:
- Next, insert the trigger pin. Again, ensure it's fully seated.
7. Reassemble the Lower Receiver:
- Once both pins are fully seated, reinstall the bolt carrier group (BCG) and charging handle.
8. Test Fire (At a Range):
- Crucially, test-fire the upgraded lower receiver at a designated shooting range under safe conditions. Ensure you follow all local, state, and federal regulations regarding firearm handling and use. This test fire is critical to confirm proper function and safety.
Troubleshooting Common Issues
- Pins won't go in: Double-check orientation of the trigger assembly parts and ensure no debris obstructs the pins.
- Trigger feels gritty: Ensure all parts are clean and properly lubricated.
- Trigger doesn't function correctly: If the trigger malfunctions, immediately stop using it and consult a qualified gunsmith.
Conclusion
Installing a Geissele G2S trigger enhances your AR-15's performance. This detailed guide, combined with careful attention and adherence to safety precautions, will ensure a successful upgrade. Remember to always prioritize safety and seek professional assistance if needed. Improper installation can compromise the firearm's safety and reliability.
