The Geissele Super Semi-Automatic (G2S) trigger is a popular upgrade for AR-15 rifles, known for its crisp break and short reset. However, installing it requires careful attention to detail. This guide provides a step-by-step walkthrough, ensuring a smooth and successful installation. Always prioritize safety and handle firearms responsibly. This guide assumes basic familiarity with AR-15 disassembly. If you're unsure about any step, consult a qualified gunsmith.
Tools and Materials You'll Need
Before you begin, gather the necessary tools and materials:
- Geissele G2S Trigger: Ensure you have the correct model for your lower receiver.
- AR-15 Lower Receiver: This is where the trigger assembly resides.
- Punch Set: Including a roll pin punch and a hammer. Different sizes may be needed.
- Torque Wrench: Essential for proper tightening of the trigger pins, preventing damage.
- Small Screwdriver: (Potentially needed depending on your lower receiver’s features.)
- Clean Work Surface: To prevent losing small parts.
- Safety Glasses: Always wear eye protection when working with tools.
- Gun Cleaning Kit (Optional): Cleaning the lower receiver beforehand is always a good practice.
Step-by-Step Installation Guide
Safety First! Always ensure the firearm is unloaded and the bolt is locked to the rear before beginning any disassembly or assembly. Visually inspect the firearm to verify it's clear.
-
Disassemble the Lower Receiver: Carefully remove the lower parts kit (LPK). This typically involves removing the pistol grip, trigger guard, and takedown pins. Refer to your firearm's manual if needed.
-
Remove the Existing Trigger and Hammer Pins: Use your punch set to carefully drive out the trigger and hammer pins. These pins usually require gentle tapping; avoid using excessive force. Keep track of their orientation for reassembly.
-
Remove the Old Trigger and Hammer: Once the pins are out, remove the old trigger and hammer assembly.
-
Install the G2S Trigger and Hammer: Carefully insert the Geissele G2S trigger and hammer into the lower receiver. Ensure they are properly aligned.
-
Install the Hammer Pin: Insert the hammer pin, aligning it correctly. Gently tap the pin into place using your punch. Do not fully seat the pin yet.
-
Install the Trigger Pin: Insert the trigger pin, aligning it correctly. Gently tap the pin into place using your punch. Do not fully seat the pin yet.
-
Check Alignment: Before fully seating the pins, visually inspect the trigger and hammer to ensure they are correctly installed and moving smoothly. You might need to slightly adjust their position.
-
Fully Seat the Pins: Once everything is correctly aligned, carefully tap the pins fully into place using your punch. Use a mallet or a hammer with a soft face to avoid damaging the pins or receiver.
-
Torque the Pins (Crucial Step): This is extremely important. Use a torque wrench to ensure proper tightness of the trigger and hammer pins. Refer to Geissele's instructions for the recommended torque specifications. Over-tightening can damage the lower receiver.
-
Reassemble the Lower Receiver: Carefully reinstall the lower parts kit, including the pistol grip, trigger guard, and any other components.
-
Test Fire (At a Range): Once reassembled, take your firearm to a shooting range to test fire and verify proper function. This is the only way to confirm successful installation and ensure the safety of the weapon.
Troubleshooting Common Issues
- Trigger Doesn't Function: Double-check the alignment of the trigger and hammer. Ensure the pins are fully seated and properly torqued.
- Trigger Feels Gritty: This can be due to the trigger mechanism needing lubrication. Consult the manufacturer's recommended lubricant.
- Difficult Installation: If you encounter resistance during installation, stop and double-check the alignment of parts. Seek assistance from a qualified gunsmith if needed.
Remember, proper installation is critical for safety and functionality. If you are not comfortable with any of these steps, consult a qualified gunsmith. This guide is for informational purposes only and does not substitute professional guidance. Always prioritize safety when working with firearms.
