The DPMS LR-308 is a popular platform for long-range shooting and hunting, but its factory handguard can sometimes leave enthusiasts wanting more. Whether you're looking for improved ergonomics, better heat dissipation, or the ability to mount accessories, replacing the handguard is a common upgrade. This guide will walk you through the process of DPMS LR-308 handguard replacement, covering different types of handguards and potential challenges. We'll ensure you have the knowledge to successfully upgrade your rifle.
Understanding Your DPMS LR-308 Handguard
Before diving into the replacement process, it's crucial to understand your current handguard and its attachment method. Most DPMS LR-308 rifles utilize a two-piece barrel nut system. This means the handguard is secured to the barrel nut, which is itself attached to the upper receiver. This system can sometimes differ slightly depending on the year and specific model of your rifle.
Key Considerations Before Starting:
- Handguard Type: Identify the type of handguard currently installed. Is it a standard quad rail, a free-floating M-LOK system, or something else? This will determine the compatibility of your replacement.
- Barrel Nut Compatibility: Verify compatibility with your existing barrel nut. Many aftermarket handguards require specific barrel nuts or may include one in the package.
- Tools and Materials: Gather the necessary tools. This will typically include a wrench (often a specific size for the barrel nut), a punch, and potentially a vise (for added stability).
Choosing Your Replacement DPMS LR-308 Handguard
The market offers a wide array of handguards compatible with the DPMS LR-308 platform. The best choice for you will depend on your individual needs and preferences.
Popular Handguard Types:
- KeyMod: A modular system using slots to attach accessories. Offers lightweight design and flexibility.
- M-LOK: Another popular modular system, but using slots and a different design than KeyMod, considered by some to be more user friendly and robust.
- Free-Floating: This design ensures the handguard doesn't contact the barrel, improving accuracy.
- Quad Rail: Provides ample space for attaching accessories via Picatinny rails. Can be heavier than other options.
Factors to Consider:
- Weight: A lighter handguard reduces overall rifle weight, improving handling.
- Material: Aluminum is common, but some offer carbon fiber for even lighter weight.
- Length: Choose a length that suits your shooting style and desired balance.
- Accessories Compatibility: Ensure it's compatible with your desired accessories (lights, grips, bipods, etc.).
Case Study: Upgrading from a Quad Rail to an M-LOK Handguard
Switching from a bulky quad rail to a sleek M-LOK handguard can significantly improve the rifle's handling and reduce weight. This upgrade typically results in a noticeable difference in feel and maneuverability, particularly during longer shooting sessions. The M-LOK system often allows for a more customized setup by attaching only the necessary accessories.
Step-by-Step DPMS LR-308 Handguard Replacement
This guide assumes basic firearms knowledge and safe handling practices. Always ensure the firearm is unloaded and pointed in a safe direction before beginning any maintenance or modification.
Tools Required:
- Appropriate wrench for your barrel nut. This is often a specialized wrench and will vary depending on the specific barrel nut used.
- Punch (brass is recommended)
- Torque wrench (for proper tightening of the barrel nut)
- Vise (optional, but recommended)
- Upper receiver vise block (optional but recommended for added safety)
- Safety Glasses
- Gloves
Steps:
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Unloading and Safe Handling: Verify the firearm is unloaded. Point the rifle in a safe direction.
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Remove Existing Handguard: Depending on your specific handguard, this will involve removing any screws or other fasteners. Consult your handguard's instructions if needed. This will involve releasing the barrel nut. This may require tools to keep the barrel nut from rotating.
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Remove the Barrel Nut: Use the appropriate wrench to carefully loosen and remove the barrel nut. A vise can provide added stability and prevent damage. Proceed slowly and carefully.
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Install the New Barrel Nut (If Necessary): If your new handguard requires a different barrel nut, install it now. Tighten it to the manufacturer's specified torque.
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Install the New Handguard: Carefully align the new handguard with the barrel nut and upper receiver. Secure it according to the manufacturer's instructions.
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Test and Secure: Ensure the handguard is firmly attached and doesn't wobble. Test the function of any mounted accessories.
Troubleshooting Common Issues
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Barrel Nut Removal Difficulties: If you encounter difficulty removing the barrel nut, consider using penetrating oil or a heat gun (use caution!) to loosen it.
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Handguard Alignment: If the handguard doesn't align properly, double-check that the barrel nut is correctly installed.
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Accessory Compatibility: Always check compatibility before purchasing any accessories for your new handguard.
Conclusion: Enhancing Your DPMS LR-308
Replacing the handguard on your DPMS LR-308 can significantly improve its performance and ergonomics. By carefully selecting a suitable handguard and following these steps, you can complete this upgrade with confidence, improving your shooting experience. Remember, safety is paramount. Always handle firearms responsibly and consult professional gunsmiths if you encounter any difficulties during the process. Enjoy your upgraded rifle!