The Smith & Wesson M&P 15 is a popular AR-15 platform rifle, known for its reliability and versatility. A critical component of its safe operation is the safety selector. Understanding its function, operation, and potential issues is crucial for any M&P 15 owner. This guide provides a comprehensive overview, covering everything from basic functionality to troubleshooting common problems.
How the M&P 15 Safety Selector Works
The M&P 15 safety selector is a lever, typically located on the right side of the lower receiver, just behind the pistol grip. It controls the firing mechanism, preventing accidental discharge. This ambidextrous design allows both right and left-handed shooters to easily manipulate the selector. It usually operates in three positions:
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Safe (S): In this position, the firearm is completely locked, preventing the trigger from engaging the firing pin. This is the position the rifle should always be in unless actively engaged in shooting.
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Semi-Automatic (S or Semi): In this position, the rifle fires one round per trigger pull. This is the standard firing mode for most shooting situations.
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Full-Automatic (F or Auto): Important Note: The standard M&P 15 is not equipped with full-auto capabilities. This position is typically not present on civilian models and is only relevant to select, legally restricted models. Any markings indicating "Auto" are likely a misinterpretation or related to a modification not compliant with standard firearms regulations.
Identifying and Addressing Potential Issues
While generally reliable, the safety selector on an M&P 15, like any mechanical part, can occasionally present issues. Here are some common problems and solutions:
1. Stiff or Difficult Selector Movement
A stiff safety selector can be frustrating and potentially dangerous in a rapid-response situation. This can be caused by:
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Dirt and Debris: Regular cleaning and lubrication are essential. Use a suitable gun cleaning solvent and lubricant, paying close attention to the safety selector mechanism.
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Wear and Tear: Over time, components can wear down. If cleaning doesn't resolve the issue, professional gunsmith assistance might be necessary.
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Improper Installation: If the safety selector was recently replaced or installed incorrectly, it may need readjustment by a qualified gunsmith.
2. Safety Selector Not Engaging Properly
If the safety selector doesn't lock firmly into the "Safe" position, it presents a significant safety hazard. This could be due to:
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Damaged Parts: Inspect the selector lever and surrounding components for any signs of damage or wear. Replacement might be required.
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Incorrect Assembly: Ensure proper installation of the safety selector and associated parts. Again, consult a gunsmith if uncertain.
3. Selector Ambidextrous Operation
Many M&P 15 models offer ambidextrous safety selectors. This feature should provide smooth operation from either side of the receiver. Issues could arise from:
- Loose Components: Check for proper tightening and secure installation of all ambidextrous components.
Maintenance and Care
Regular maintenance is vital for optimal performance and safety. This includes:
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Cleaning: Clean your M&P 15 regularly, using a suitable cleaning kit and solvent. Pay special attention to the safety selector mechanism, removing any dirt, debris, or buildup.
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Lubrication: Apply a high-quality gun lubricant to moving parts, including the safety selector, to ensure smooth operation.
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Inspection: Regularly inspect the safety selector for any signs of wear, damage, or unusual movement.
Conclusion
The safety selector is a crucial part of the M&P 15's operation and safety. Understanding its function, identifying potential problems, and performing regular maintenance are essential for responsible firearm ownership. If you encounter any issues beyond simple cleaning and lubrication, it is always best to consult a qualified gunsmith to ensure the safe and proper functioning of your firearm. Remember, responsible gun ownership includes prioritizing safety and understanding the mechanics of your weapon.
