The Smith & Wesson M&P 15 Sport II is a popular AR-15 platform rifle, praised for its affordability and reliability. However, like any firearm, it's not immune to potential issues. This guide delves into common problems reported by M&P 15 Sport II owners, offering troubleshooting tips and solutions. We'll explore everything from minor malfunctions to more significant concerns, providing valuable information for both novice and experienced shooters.
Common M&P 15 Sport II Issues and Troubleshooting
While generally reliable, several recurring problems have been reported by M&P 15 Sport II users. Let's examine some of the most frequent concerns:
1. Feeding Problems: Failure to Feed or Failure to Eject
Symptoms: Rounds failing to chamber properly, jams during feeding, or spent casings failing to eject completely.
Possible Causes:
- Magazine Issues: A bent or damaged magazine, or a magazine not fully seated, can significantly impact feeding reliability. Try different magazines to rule this out.
- Ammunition Issues: Using low-quality, dirty, or improperly lubricated ammunition can lead to feeding problems. Experiment with different brands and types of ammunition.
- Gas System Issues: Although less common, a problem with the gas system (e.g., gas tube or block) can affect the cycling of the action. This requires a more thorough inspection by a qualified gunsmith.
- Bolt Carrier Group (BCG) Issues: A dirty or damaged BCG can cause malfunctions. Thorough cleaning and lubrication are crucial.
Troubleshooting:
- Clean the firearm thoroughly: A clean weapon is a reliable weapon. Pay close attention to the BCG, gas system, and chamber.
- Inspect the magazines: Check for damage or wear. Ensure they are seated correctly.
- Try different ammunition: Switch to a different brand or type of ammunition to determine if the issue is ammunition-related.
- Check the gas system: Inspect the gas tube and block for any obstructions or damage. If you're not comfortable doing this yourself, seek professional help.
2. Gas System Malfunctions
Symptoms: Weak or erratic cycling, failure to cycle completely, or excessive gas blowback.
Possible Causes:
- Gas Tube/Block Issues: These parts can become dirty, damaged, or improperly installed.
- Gas Port Issues: The gas port might be improperly sized or damaged.
Troubleshooting:
- Clean the gas system meticulously: Remove and clean the gas tube and block thoroughly, ensuring they're properly reinstalled.
- Check the gas port: While this usually requires specialized tools, ensure it's clean and not damaged. If you suspect a problem, consult a gunsmith.
3. Accuracy Issues
Symptoms: Consistent shots grouping poorly, shots hitting far from the point of aim.
Possible Causes:
- Sight Alignment: Improperly zeroed sights or a damaged optic are common causes of accuracy problems.
- Ammunition Quality: Inconsistent ammunition can impact accuracy.
- Shooting Technique: Incorrect grip, stance, or trigger control can lead to poor accuracy.
Troubleshooting:
- Verify sight alignment: Ensure the sights are properly zeroed and in good working order.
- Use consistent ammunition: Try a higher-quality, consistent brand of ammunition.
- Review shooting technique: Practice proper shooting fundamentals to improve accuracy. Consider professional instruction.
4. Other Potential Problems
Other reported problems include issues with the trigger, safety selector, and charging handle. These often require more specialized attention and may necessitate professional repair or replacement.
Prevention and Maintenance
Regular cleaning and lubrication are crucial for maintaining the reliability of your M&P 15 Sport II. Using high-quality ammunition and properly storing the firearm also contributes to its longevity and performance. Avoid using excessive force when assembling or disassembling the rifle.
When to Seek Professional Help
If you're experiencing persistent problems, or if you're uncomfortable performing maintenance or repairs yourself, consult a qualified gunsmith. They possess the expertise and tools necessary to diagnose and resolve more complex issues. Remember, firearm safety is paramount.
Disclaimer: This information is for educational purposes only. Always consult your firearm's owner's manual and follow all safety precautions when handling firearms. Improper handling or modification of firearms can result in injury or damage.
