The Smith & Wesson M&P 15 Sport II is a popular AR-15 platform rifle, known 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 cover everything from minor malfunctions to more significant concerns, helping you understand potential issues and maintain your rifle's optimal performance.
Common M&P 15 Sport II Problems and Solutions
While generally reliable, several recurring issues have been reported by M&P 15 Sport II users. Let's address some of the most prevalent:
1. Failure to Feed/Extract/Eject
This encompasses a range of malfunctions related to the rifle's ability to reliably cycle ammunition. Causes can include:
- Magazine Issues: Ensure you are using compatible magazines in good condition. Bent feed lips, damaged followers, or weak springs can all contribute to feeding problems. Try different magazines to isolate the issue.
- Ammunition Problems: Using low-quality, dirty, or improperly lubricated ammunition can cause malfunctions. Try different types of ammunition known for reliable function.
- Gas System Issues: The gas system's proper function is crucial for reliable cycling. A dirty gas tube or a malfunctioning gas block can impede the cycling process. Cleaning these components thoroughly is essential.
- Improper Bolt Carrier Group (BCG) Function: A dirty or damaged BCG can significantly impact reliability. Disassemble, clean, and lubricate the BCG according to the manufacturer's instructions.
2. Gas System Issues
The direct impingement gas system in the M&P 15 Sport II can sometimes lead to issues:
- Excessive Gas: This can result in forceful ejection, increased recoil, and potential damage to components. Cleaning the gas system is crucial. Over-gassed conditions might require adjusting the gas block (if adjustable) or using a different buffer weight.
- Insufficient Gas: This can lead to failure to cycle, especially with certain ammunition types. Cleaning the gas system should be the first step. Consider adjusting the gas block (if adjustable) or switching to a lighter buffer.
3. Trigger Issues
While not always problematic, some users report issues with the trigger:
- Trigger Creep: This refers to the trigger's movement before the break. While a degree of creep is normal, excessive creep can impact accuracy. Replacing the trigger with an aftermarket upgrade is a common solution.
- Trigger Slack: Similar to creep, excessive slack before the trigger breaks can affect accuracy. An aftermarket trigger might improve performance.
4. Accuracy Issues
Inaccuracy issues can stem from various factors:
- Ammunition: Consistent ammunition choice is key to achieving good accuracy.
- Optics: Using a quality optic properly zeroed is critical for precision shooting.
- Shooting Technique: Proper shooting technique is essential for consistent accuracy.
- Barrel Issues: Although rare, a barrel problem could exist.
Troubleshooting Tips
- Clean Your Rifle Regularly: Regular cleaning and lubrication are paramount for reliable operation.
- Inspect Your Ammunition: Ensure your ammunition is clean and of high quality.
- Check for Proper Lubrication: Use gun oil specifically designed for firearms.
- Consult the Manual: Review the owner's manual for detailed troubleshooting information.
- Seek Professional Help: If problems persist, seek assistance from a qualified gunsmith.
Conclusion
The Smith & Wesson M&P 15 Sport II is a solid rifle, but like any firearm, it requires proper maintenance and care. By understanding common problems and implementing the solutions outlined above, you can ensure your rifle performs reliably and accurately for years to come. Remember, always prioritize safety and consult with a qualified professional if you are uncomfortable performing any maintenance or repairs yourself.
