An AR-15 trigger that fails to reset is a serious malfunction, rendering your firearm unsafe and unreliable. This issue can stem from various problems, ranging from simple user error to more complex mechanical failures. This guide will walk you through the common causes, troubleshooting steps, and potential solutions to get your AR-15 trigger resetting correctly. Safety is paramount, so always follow proper firearm safety procedures and handle your weapon responsibly. If you are uncomfortable performing any of these steps, consult a qualified gunsmith.
Common Causes of AR-15 Trigger Failure to Reset
Several factors can contribute to an AR-15 trigger not resetting. These include:
1. Disconnector Issues:
- Bent or Damaged Disconnector: The disconnector is a crucial part preventing the hammer from dropping until the trigger is fully reset. A bent or damaged disconnector will prevent proper reset.
- Improper Disconnector Installation: Incorrect installation of the disconnector can lead to malfunctions, including failure to reset.
- Dirty or Obstructed Disconnector: Build-up of debris, dirt, or carbon can interfere with the disconnector's movement, causing it to fail.
2. Hammer Issues:
- Hammer Drag: Excessive friction or drag on the hammer can prevent its complete rearward movement, inhibiting reset. This can be due to burrs, improper lubrication, or a poorly fitted hammer pin.
- Damaged Hammer: A damaged or worn hammer can malfunction, preventing proper reset.
3. Trigger Issues:
- Trigger Pin Issues: A loose or improperly installed trigger pin can disrupt the trigger's movement and prevent resetting.
- Improper Trigger Adjustment: Incorrectly adjusted triggers can lead to various malfunctions, including failure to reset. This is particularly common with aftermarket triggers.
- Damaged or Worn Trigger: Excessive use or rough handling can damage the trigger itself, preventing proper function.
4. Bolt Carrier Group (BCG) Issues:
- Bolt Carrier Issues: While less common, a damaged bolt carrier can sometimes interfere with the timing of the trigger reset mechanism.
5. Other Potential Problems:
- Ammunition Issues: While rare, extremely weak or improperly manufactured ammunition could theoretically contribute to timing issues.
- Improper Lubrication: Insufficient or improper lubrication can increase friction and inhibit smooth operation.
- Improperly Installed Parts: Inaccurate installation of any lower receiver components can lead to malfunctions.
Troubleshooting Steps for AR-15 Trigger Reset Problems
Before diving into repairs, perform these checks:
- Thorough Cleaning: Clean your entire lower receiver, paying close attention to the trigger group components. Remove all debris and carbon buildup.
- Lubrication: Apply a high-quality gun lubricant to all moving parts of the trigger group. Avoid excessive lubrication.
- Visual Inspection: Carefully examine the disconnector, hammer, trigger, and trigger pins for any signs of damage, bending, or wear.
- Function Check: With the weapon unloaded and pointed in a safe direction, dry-fire the weapon, observing the movement of each component. Look for any binding or unusual movement.
Solutions and Repairs
If the problem persists after cleaning and inspection, you may need to:
- Replace the Disconnector: If the disconnector is bent, damaged, or improperly installed, replace it with a new one.
- Replace the Hammer: If the hammer shows signs of damage or wear, replace it with a new, correctly functioning hammer.
- Address Trigger Pin Issues: If the trigger pins are loose or damaged, replace them.
- Adjust the Trigger (if applicable): If you have an adjustable trigger, refer to the manufacturer's instructions for proper adjustment. Improper adjustment can worsen the problem.
- Consult a Gunsmith: If you are uncomfortable disassembling or repairing your firearm, or if the problem persists after these steps, take your AR-15 to a qualified gunsmith for professional assistance.
Prevention and Maintenance
Regular cleaning, lubrication, and inspection are crucial for preventing malfunctions, including trigger reset issues. Use high-quality ammunition and ensure proper storage to avoid wear and tear.
This guide provides information for educational purposes only. Always prioritize safety and handle firearms responsibly. Improper handling or repair of firearms can lead to serious injury or death. Consult a qualified gunsmith for any repairs you are not comfortable performing yourself.
