The AR-15 platform's intricate design relies on numerous components working in harmony, and the trigger spring is no exception. Often overlooked, this small but crucial part plays a significant role in the rifle's functionality, influencing trigger pull weight, reset, and overall reliability. Understanding its function, different types available, and common troubleshooting steps is vital for any AR-15 owner, whether a seasoned enthusiast or a new shooter.
Understanding the AR-15 Trigger Spring's Role
The primary function of the AR-15 trigger spring is to return the trigger to its neutral position after the trigger is pulled and the firing pin is released. This seemingly simple task is essential for the rifle's safe and reliable operation. Without a functioning trigger spring, the trigger would remain depressed, rendering the firearm unsafe and incapable of firing subsequent rounds. Furthermore, the spring's tension directly influences the trigger pull weight, a critical factor affecting accuracy and shooter comfort. A weaker spring results in a lighter trigger pull, while a stronger spring increases the pull weight.
Types of AR-15 Trigger Springs
While the basic function remains consistent, variations exist in AR-15 trigger springs, primarily concerning their strength and material. These variations often stem from modifications to the trigger group, aiming to improve performance or address specific issues. While you won't find readily available "heavy" or "light" springs labeled as such, the differences are subtly reflected in the feel of the trigger pull. A change in spring strength can be a result of replacing the entire trigger group with an aftermarket unit, or a more subtle component replacement within the trigger assembly.
Many aftermarket trigger assemblies are available, each with its own spring characteristics contributing to the overall trigger feel and performance. Understanding your specific trigger group and its components is crucial before attempting any modifications or replacements.
Troubleshooting Common AR-15 Trigger Spring Issues
Problems with the trigger spring are relatively rare but can manifest in several ways:
1. Trigger Doesn't Reset
This is the most significant issue. If the trigger fails to reset, the rifle is unsafe and unusable. This often points to a broken or excessively weak trigger spring. Inspection of the spring for damage is the first step. If damaged, replacement is necessary. Ensure you use a spring specifically designed for your AR-15 trigger assembly. Using an incorrect spring can lead to malfunctions or damage to other components.
2. Heavy or Uncomfortable Trigger Pull
An excessively heavy trigger pull might not be indicative of a faulty spring, but it could be a symptom of a spring that is too strong or other issues within the trigger assembly. This could include grit, dirt, or other debris hindering the smooth operation of the trigger mechanism. Thorough cleaning and lubrication are essential troubleshooting steps. If the problem persists after cleaning, further investigation of the trigger group's internal components might be necessary.
3. Light or Spongy Trigger Pull
A light or spongy trigger pull could indicate a weak or worn-out trigger spring. This can compromise the safety and reliability of the firearm. Replacement with a new spring of appropriate strength is recommended in this scenario.
Maintaining Your AR-15 Trigger Spring
Regular maintenance and inspection of the trigger spring and the entire trigger group are crucial for the reliable operation of your AR-15. As part of routine cleaning and maintenance, carefully inspect the spring for any signs of wear, damage, or fatigue. Pay attention to its tension and ensure it's functioning correctly.
Remember, working on firearm components requires a strong understanding of gun safety procedures. If you're unsure about any aspect of this process, consult a qualified gunsmith. Improper handling of firearms can lead to serious injury or even death.
This article provides general information and should not be considered a substitute for professional guidance. Always prioritize safety and consult qualified resources when dealing with firearms.
