An AR-15 trigger that fails to reset is a serious malfunction, rendering your firearm unreliable and potentially dangerous. This problem, while frustrating, is often fixable with proper diagnosis and troubleshooting. This guide will walk you through the common causes of this issue and provide practical solutions. Safety is paramount; always ensure your firearm is unloaded and pointed in a safe direction before performing any maintenance or troubleshooting.
Common Causes of AR-15 Trigger Failure to Reset
Several factors can prevent your AR-15 trigger from resetting properly. These include:
1. Disconnector Issues:
- Bent or Damaged Disconnector: The disconnector is a crucial component that prevents the hammer from falling until the trigger is fully reset. A bent or damaged disconnector is a frequent culprit for trigger reset problems. Inspect it closely for bends, cracks, or wear.
- Disconnector Not Engaging Properly: Even a perfectly functional disconnector can fail to engage if improperly installed or if there's debris interfering with its movement.
- Improper Disconnector Spring Tension: A weak or broken disconnector spring can prevent the disconnector from properly engaging the hammer.
2. Hammer Issues:
- Hammer Not Fully Rotating: The hammer needs to rotate fully to allow the disconnector to engage. If the hammer is impeded or sluggish in its rotation, reset may be hampered.
- Burrs or Debris: Small particles of debris can obstruct the hammer's movement and prevent proper reset.
3. Trigger Issues:
- Trigger Pin Issues: Loose or bent trigger pins can affect the trigger's movement and impact the reset. Check for proper pin tightness and straightness.
- Trigger Bow Interference: The trigger bow itself might be slightly bent or contacting other parts, hindering its ability to fully reset.
- Excessive Trigger Pull Weight: Although not a direct cause of failure to reset, an excessively heavy trigger pull can sometimes make the reset feel incomplete or sluggish.
4. Other Potential Problems:
- Improper Lower Receiver Installation: Incorrect installation of the lower receiver parts can lead to numerous malfunctions, including trigger reset issues.
- Damaged or Worn Parts: Over time, wear and tear on various internal components can affect the functionality of the trigger system.
Troubleshooting Steps for AR-15 Trigger Reset Problems
Before diving into repairs, systematically check these points:
- Visual Inspection: Thoroughly inspect all trigger components for damage, wear, or debris. Pay close attention to the disconnector, hammer, trigger, and trigger pins. Use a flashlight and magnifying glass if necessary.
- Clean the Fire Control Group: Clean the entire fire control group with a suitable gun cleaning solvent and brush. Remove all traces of dirt, grime, and lubricant.
- Lubricate Properly: Use a high-quality gun lubricant, sparingly applied to reduce friction. Excessive lubricant can attract debris and cause malfunctions.
- Check for Proper Installation: Double-check the installation of all fire control group components, ensuring everything is seated correctly and aligned.
- Function Test (Slowly and Carefully): With an empty magazine and a safe backstop, manually cycle the action slowly and observe the movement of each component. This helps isolate the exact point of failure.
When to Seek Professional Help
If you've attempted the above troubleshooting steps and your AR-15 trigger still doesn't reset properly, it's crucial to seek professional help from a qualified gunsmith. Attempting complex repairs without the proper knowledge and tools can lead to further damage or injury.
Preventative Maintenance
Regular cleaning, lubrication, and inspection are key to preventing trigger malfunction. Establishing a routine maintenance schedule will ensure your AR-15 functions reliably and safely.
Disclaimer: This information is for educational purposes only. Always prioritize safety and handle firearms responsibly. This guide does not replace professional gunsmithing services. Improper handling or repair of firearms can lead to serious injury or death.
