Replacing the trigger assembly in your Mossberg 500 shotgun can seem daunting, but with the right tools and a methodical approach, it's a manageable task for even moderately skilled gunsmiths. This guide provides a step-by-step walkthrough, ensuring a safe and successful replacement. Safety is paramount throughout this process. Always treat firearms as if they are loaded, even if you know they are not.
Tools You'll Need
Before you begin, gather the following tools:
- New Mossberg 500 metal trigger assembly: Ensure you purchase the correct part number for your specific model.
- Screwdrivers: You'll need both Phillips head and flathead screwdrivers of various sizes.
- Punch: A brass punch is ideal to avoid damaging parts. A small steel punch can be used cautiously.
- Hammer: A small ball-peen hammer or similar will work.
- Gunsmithing mat: This protects your parts and provides a clean workspace.
- Safety glasses: Essential to protect your eyes from flying debris.
- Gloves: Protect your hands and improve grip.
- Gun oil: A high-quality gun oil is needed for lubrication after reassembly.
Step-by-Step Replacement Guide
This guide assumes some familiarity with firearms disassembly. If you're unsure about any step, seek assistance from a qualified gunsmith.
1. Disassemble the Shotgun:
First, completely unload the shotgun. Visually and physically inspect to ensure it's clear of ammunition. Then, follow the standard procedure for disassembling your Mossberg 500 model. This typically involves removing the magazine tube, the forearm, and then accessing the receiver. Consult your owner's manual for specific instructions, as variations may exist between models.
2. Remove the Old Trigger Assembly:
Once the receiver is open, you'll see the trigger assembly. This typically involves removing several screws and pins securing the assembly to the receiver. Carefully note the location and orientation of each part before removing them. This will be crucial for reassembly. Use the punches and hammer to carefully drive out any pins.
3. Install the New Trigger Assembly:
Now, carefully align the new trigger assembly with the receiver. Ensure all parts are properly seated and aligned before tightening screws or installing pins. Refer to your new assembly's instructions or a detailed diagram if needed.
4. Reassemble the Shotgun:
Once the new trigger assembly is installed, carefully reassemble the shotgun following the reverse order of disassembly. Pay close attention to ensure all parts are properly seated and aligned.
5. Function Check:
Before using the shotgun, perform a thorough function check. Dry-fire the shotgun several times (with no ammunition) to ensure the trigger operates smoothly and there are no binding issues. Once you are confident it functions correctly, carefully load a small amount of ammunition and conduct a live fire test at a safe shooting range.
Troubleshooting
If you encounter issues during the process, several potential problems might arise:
- Parts not aligning properly: Double-check each step for proper alignment. Refer to diagrams or videos if needed.
- Stripped screws: Use the correct size screwdriver to avoid stripping the screw heads.
- Broken parts: Inspect all parts for damage before attempting to reassemble. If necessary, replace damaged components.
Important Considerations
- Consult your owner's manual: Always refer to the official Mossberg 500 owner's manual for specific instructions regarding disassembly and reassembly. Model variations exist, and procedures may differ.
- Seek professional help: If you're uncomfortable performing this task, consult a qualified gunsmith. Improper assembly can lead to malfunction and potential injury.
- Safety first: This is crucial. Always handle firearms safely and responsibly.
This guide aims to provide a helpful overview of the Mossberg 500 metal trigger assembly replacement. Remember to prioritize safety and consult your owner's manual and/or a qualified professional if you are unsure about any step in the process. Improper handling of firearms can lead to serious injury or death.
