Replacing or removing the gas block on your M&P15 can seem daunting, but with the right tools and a methodical approach, it's a manageable task for any competent gun owner. This guide will walk you through the process, emphasizing safety and precision. Remember, always prioritize safety when working on firearms. If you are uncomfortable with any step, seek the assistance of a qualified gunsmith.
Tools You'll Need:
- Appropriate sized wrench for your gas block: This will depend on the specific gas block you have. Some use set screws, others utilize a clamping system. Check your gas block's installation method before starting.
- Punch (brass is recommended): Used for carefully driving out pins or aligning components.
- Hammer: For gentle taps with the punch. Avoid excessive force.
- Torque wrench (optional but highly recommended): Precise torque ensures proper tightening and prevents damage.
- Cleaning supplies: Keep your workspace clean and your firearm free of debris.
- Safety glasses and gloves: Always protect your eyes and hands.
- A gun cleaning mat: Protect your work surface and keep parts organized.
Step-by-Step Gas Block Removal:
This guide assumes a standard pinned gas block. Low-profile gas blocks or those with different fastening mechanisms may require slightly different techniques. Always consult your specific firearm's manual and the instructions provided with your gas block.
1. Disassemble the Upper Receiver:
- Ensure the firearm is unloaded and clear. Double-check the chamber and magazine well.
- Separate the upper and lower receivers. This usually involves pressing a takedown pin.
2. Secure the Barrel:
- You'll need to firmly support the barrel to prevent it from shifting or twisting during the gas block removal process. Consider using a vise or barrel clamp. Ensure the barrel is properly supported to avoid damage.
3. Locate the Gas Block Pins (if applicable):
- Many gas blocks are secured with roll pins. Identify their locations.
4. Remove the Gas Block Pins:
- Using a brass punch and a hammer, carefully tap out the roll pins. Start with gentle taps and increase force only if necessary. Avoid damaging the pins or the receiver. Work methodically, one pin at a time.
5. Remove the Gas Block:
- With the pins removed (if applicable), the gas block should slide off the barrel. If it's resistant, gently rock it back and forth while pulling. Avoid using excessive force.
6. Inspect the Components:
- Once removed, inspect both the gas block and the barrel for any damage or signs of wear. Clean any debris.
Reinstallation (Reverse the Steps):
Reinstalling the gas block involves reversing these steps. Ensure all components are correctly aligned and that you use the appropriate torque when tightening any screws or pins. Incorrect torque can damage the gas block or the barrel.
Important Considerations:
- Gas Block Type: Different gas blocks have different removal methods. Consult your specific gas block's instructions.
- Barrel Nut Torque: If you're replacing the barrel nut, ensure you use the correct torque specification to avoid damage.
- Safety First: Always handle firearms safely and responsibly.
This guide provides a general overview. Always refer to the manufacturer's instructions for your specific firearm and gas block. If you are uncertain about any step, seek professional assistance from a qualified gunsmith. Improper handling of firearms can be dangerous. Remember to always practice safe gun handling procedures.
