Replacing your DPMS LR-308 handguard might seem daunting, but with the right tools and a methodical approach, it's a manageable task. This guide provides a step-by-step process, covering various handguard types and addressing common challenges. Whether you're upgrading for aesthetics, improved ergonomics, or enhanced heat dissipation, this guide will equip you to successfully complete the replacement.
Understanding Your DPMS LR-308 Handguard
Before starting, identify your current handguard type. DPMS LR-308 rifles utilize different handguard systems, including:
- Standard quad-rail systems: These feature four rails for attaching accessories. Replacement involves removing the screws or fasteners securing the handguard to the barrel nut.
- Free-floating handguards: These don't directly contact the barrel, providing improved accuracy. Removal typically involves detaching the handguard retaining mechanisms, which can vary depending on the manufacturer.
- Keymod and M-LOK systems: These modular systems allow for the attachment of accessories directly to the handguard, offering weight savings and customization options. Replacement involves detaching the handguard from the barrel nut and replacing it with a compatible handguard.
Tools You'll Need
Gathering the necessary tools beforehand will streamline the process. You'll likely need:
- Appropriate sized wrench or socket: This will depend on the specific screws or fasteners securing your handguard.
- Punch (optional): A punch can be helpful for gently tapping out stubborn pins or fasteners.
- Torque wrench (recommended): Using a torque wrench ensures you don't over-tighten screws, preventing damage to your rifle.
- New handguard: Choose a replacement handguard compatible with your DPMS LR-308's barrel nut and gas system.
- Gunsmithing mat or clean work surface: This will protect your rifle and provide a stable workspace.
- Safety glasses and gloves: Always prioritize safety when working on firearms.
Step-by-Step Handguard Replacement Guide
Disclaimer: Always ensure your firearm is unloaded and clear before undertaking any maintenance or modification. If you're uncomfortable performing this task, seek assistance from a qualified gunsmith.
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Unloading and Safety Check: Verify the firearm is unloaded. Visually and physically inspect the chamber and magazine well.
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Removing the Existing Handguard: Carefully inspect your current handguard to identify the securing mechanism. This might involve removing screws, pins, or other retaining devices. Use the appropriate tools to carefully remove these fasteners.
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Detaching the Handguard: Once all fasteners are removed, gently detach the handguard from the barrel nut. Pay attention to how the handguard is attached to avoid damaging the barrel nut or other components.
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Installing the New Handguard: Align the new handguard with the barrel nut, ensuring proper fit and alignment. Secure the handguard using the appropriate screws, pins, or other fastening mechanisms. Use a torque wrench to tighten fasteners to the manufacturer's specifications.
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Final Inspection and Test: After installing the new handguard, thoroughly inspect the installation, ensuring all fasteners are secure and the handguard is properly aligned.
Choosing the Right Replacement Handguard
The selection of your new handguard depends on your preferences and intended use. Consider these factors:
- Material: Aluminum alloy handguards offer durability and heat dissipation, while polymer options are lighter and more cost-effective.
- Length: Choose a length that balances ergonomics and maneuverability.
- Rail System: Consider the rail system (quad-rail, Keymod, M-LOK) based on your accessory needs and preferences.
- Weight: Lighter handguards can improve handling, while heavier ones might offer increased rigidity.
Troubleshooting Common Issues
- Stripped Screws: If you encounter stripped screws, try using a screw extractor or seek assistance from a gunsmith.
- Difficult Removal: Apply penetrating oil to stubborn fasteners and gently work them loose.
- Improper Alignment: Double-check the alignment of the handguard before securing it.
By following these steps and choosing the right replacement handguard, you can successfully upgrade your DPMS LR-308. Remember to prioritize safety and consult a professional if needed. This comprehensive guide empowers you to confidently tackle this essential maintenance task.
