Understanding the Foundation: Functionality of the Safety Selector
The Core Purpose
The primary objective of the M&P15 safety selector is straightforward: to prevent the firearm from firing unintentionally. This critical function is achieved through a mechanical locking mechanism. Essentially, when engaged, the safety selector physically blocks the trigger, preventing it from moving backward and releasing the firing pin. This means that even if the trigger is pulled, the firearm will not discharge. The fundamental concept is to create a physical barrier between the trigger and the firing mechanism, offering a crucial layer of security.
The majority of M&P15 rifles feature two positions on their safety selector. One position, typically marked “Safe”, fully engages the safety mechanism, rendering the rifle unable to fire. The second position, frequently marked with “Fire,” or often just a symbol indicating a semi-automatic mode, disengages the safety, enabling the trigger to function and the rifle to fire when the trigger is pulled.
The internal operation is intricate. The safety selector itself connects to a series of internal parts that interact with the trigger mechanism. When the safety is engaged, it blocks the trigger bar or sear, preventing the hammer from falling and striking the firing pin. This interlocking action is the core of the safety system. Without a properly functioning safety selector, a firearm can present significant risk.
The Inner Workings: Components of the Safety Selector
Key Parts and Their Roles
To understand the functionality, it’s necessary to explore the components that make up the M&P15 safety selector. The most visible and accessible part is the selector lever. This is the part that the shooter manipulates with their thumb or finger. The lever design can vary in shape, size, and material, but its basic function remains the same: to move the internal components into the safe or fire position.
A crucial internal component is the detent. The detent is a small, spring-loaded pin that engages with notches or grooves within the lower receiver. This creates the distinct “click” felt and heard when the selector moves between the “Safe” and “Fire” positions, providing tactile feedback and helping the shooter know that the safety has been successfully engaged or disengaged. This positive click is crucial for confirming the status of the safety. The spring, in conjunction with the detent, provides the necessary tension to hold the selector in its intended position.
The safety selector, when rotated, interacts with the internal mechanisms within the firearm’s lower receiver. This often includes engaging or disengaging the trigger mechanism itself. The precise design depends on the manufacturer and model.
Essential Features of the Safety Selector
Materials and Ergonomics
The standard M&P15 safety selector is crafted from materials that provide durability and reliability. Common materials include steel and aluminum. These materials provide robust performance under the stress of regular use. The choice of material affects factors such as weight and resistance to corrosion.
The markings on the selector – the “Safe” and “Fire” indicators – are essential for clear identification. These markings are typically engraved or printed on the lever, allowing the shooter to easily and quickly determine the firearm’s status. The aesthetics can vary depending on the manufacturer, but the fundamental information they convey remains vital for safety. The size, font, and placement of these markings contribute to the overall ease of use and visual clarity.
Ergonomics and usability are vital. The selector’s position is designed to be easily accessible, generally positioned on the left side of the lower receiver, within easy reach of the shooter’s thumb when holding the rifle. The design strives to balance function and user comfort. Ambidextrous options are available, and very important to be considered.
A critical feature is the tactile feedback – the distinct, positive click experienced when the selector is moved between positions. This auditory and physical sensation provides the shooter with instant confirmation that the safety has successfully engaged or disengaged. This feedback is a key factor in safe firearm handling.
Operational Excellence: Function and Best Practices
Safe Handling Procedures
Safe and efficient firearm operation hinges on understanding how the M&P15 safety selector works within the broader context of safe handling practices. The first and most crucial practice is ensuring the safety selector is in the “Safe” position whenever the firearm is not actively being used for shooting. This includes during transport, storage, and any time the firearm is being handled for cleaning, maintenance, or inspection.
Regularly check the safety selector before handling the firearm. Visually inspect the position of the safety selector, and confirm that the markings align with the desired mode (“Safe” or “Fire”). This is a vital step to avoid any potential confusion or risk.
Proper use is essential. When ready to fire, the shooter must first ensure that the firearm is pointed in a safe direction and the intended target is clear. The shooter should then disengage the safety selector, moving it from the “Safe” to the “Fire” position. When finished shooting, or if the shooter needs to temporarily cease firing, the safety selector should immediately be returned to the “Safe” position.
Common concerns can arise with the safety selector. A stiff or hard-to-move selector can indicate a problem. Cleaning the selector and the surrounding area can often resolve this issue. Inadequate lubrication can contribute to stiffness. Other issues involve failures to function properly. Periodic inspection and cleaning, along with proper lubrication, can help maintain peak performance. Addressing problems promptly prevents the issue from escalating.
Enhancements and Upgrades
Aftermarket Options
The market offers various options to personalize and optimize the functionality of the M&P15 safety selector. Aftermarket safety selectors provide a broad range of features and benefits. The availability of these components allows shooters to tailor their rifles to their individual preferences and needs.
One primary upgrade involves the replacement of the standard safety selector lever with an aftermarket design. These designs offer several different features and benefits. Some designs will include an ambidextrous lever, catering to both right- and left-handed shooters, as well as offering greater flexibility.
These upgrades are also available in various shapes and sizes, with various lever designs (short, long, extended, or paddle-style) that enhance the user’s ability to manipulate the selector.
Before undertaking upgrades, consider how the changes will affect your shooting style and ease of use. Some options are intended for those who practice regularly.
For installation, it’s advisable to consult a qualified gunsmith, particularly for those unfamiliar with firearm mechanics.
Keeping it in Top Shape: Maintenance and Care
Cleaning, Inspection, and Storage
Maintaining the M&P15 safety selector is integral to both its performance and longevity. Regular cleaning and lubrication are necessary. The presence of dust and debris can compromise the selector’s movement and functionality. Use cleaning solutions and lubricants, carefully following the manufacturer’s instructions, to clean and lubricate the safety selector components.
Regular inspection is also essential. Check for any signs of wear, damage, or corrosion. Wear might include scratches, cracks, or areas where the finish is worn away. These signs can indicate potential problems. If any damage is observed, the selector should be replaced. Proper inspection should become a part of any regular maintenance protocol.
Proper storage is important for safety and equipment protection. When storing a firearm, make sure it is unloaded, the safety selector is engaged in the “Safe” position, and the firearm is stored in a secure location that is inaccessible to unauthorized individuals, like children.
Conclusion
In conclusion, the M&P15 safety selector is far more than just a mechanical component. It is a fundamental pillar of safe and responsible firearm handling. Understanding its function, features, and maintenance requirements is essential for any owner of an M&P15 rifle. By prioritizing safety, investing in high-quality components, and following proper maintenance practices, owners can maintain their firearm effectively. This promotes a safer shooting environment and provides peace of mind.
