An AR-15 trigger that fails to reset is a serious malfunction, rendering your firearm unsafe and unreliable. This issue, while potentially frustrating, is often solvable with careful diagnosis and troubleshooting. This guide will walk you through the common causes of this problem and provide practical solutions to get your AR-15 back up and running safely.
Understanding the AR-15 Trigger Mechanism
Before diving into troubleshooting, it's crucial to understand the basic mechanics of an AR-15 trigger group. The trigger, hammer, and disconnector work in concert to control the firing sequence. When the trigger is pulled, it releases the hammer, firing the round. The disconnector then prevents the hammer from falling again until the trigger is fully released, allowing for a safe reset. A failure in any part of this mechanism can lead to a trigger not resetting.
Common Causes of an AR-15 Trigger Not Resetting
Several factors can contribute to a trigger failing to reset. Let's examine the most frequent culprits:
1. Dirty or Damaged Trigger Components
Dust, dirt, and grime can accumulate within the trigger group, interfering with the smooth operation of the delicate parts. This is especially true if your AR-15 has seen use in adverse conditions. Similarly, damage to any component, such as a bent disconnector or a damaged trigger pin, will prevent proper reset.
2. Incorrect Trigger Installation
Improper installation of the trigger group, particularly if you've recently replaced or modified components, is a major source of malfunction. Even a slightly misaligned part can prevent the trigger from resetting correctly.
3. Worn or Damaged Parts
Over time, consistent use can wear down components, leading to malfunctions. This is especially true for high-use firearms or those subjected to harsh conditions. Worn parts may not engage properly, preventing a complete reset.
4. Issues with the Hammer
A malfunctioning hammer spring or a damaged hammer itself can also contribute to a non-resetting trigger. A weak hammer spring may not fully return the hammer to its cocked position, preventing the trigger from resetting.
5. Improper Lubrication
While lubrication is crucial for smooth operation, excessive or improper lubrication can also cause issues. Excess lubricant can gum up the trigger group, hindering movement and preventing a clean reset.
Troubleshooting Steps: Diagnosing the Problem
Before attempting any repairs, always ensure your firearm is unloaded and cleared. Follow these steps to diagnose the problem:
- Thorough Cleaning: Disassemble the lower receiver and thoroughly clean the trigger group using a high-quality gun cleaning solvent and brush. Pay close attention to all moving parts and ensure all components are free of debris.
- Visual Inspection: Carefully inspect all components for damage, wear, or misalignment. Look for bent or broken parts, particularly the disconnector, hammer, and trigger.
- Function Check: Once cleaned and inspected, carefully reassemble the trigger group. Manually cycle the action, observing the movement of each component. Identify the point where the failure occurs.
- Component Replacement: If you identify a damaged or worn component, replace it with a genuine part from a reputable manufacturer. Never use aftermarket parts without verifying their compatibility and quality.
Safety Precautions: When to Seek Professional Help
If you're uncomfortable disassembling and troubleshooting your AR-15's trigger group, it's crucial to seek the assistance of a qualified gunsmith. Improper repair can lead to serious injury. Always prioritize safety.
Conclusion: Maintaining Your AR-15
Regular maintenance and cleaning are crucial for preventing malfunctions like a non-resetting trigger. By following these troubleshooting steps and prioritizing safety, you can ensure your AR-15 operates reliably and safely. Remember, always consult a qualified gunsmith if you are unsure about any aspect of this process. The safety of yourself and those around you is paramount.
