How to Replace AR-15 Springs
Woody's answers are based on published federal and state law. Not legal advice. Consult a licensed attorney for your specific situation.
Replace AR-15 springs by removing the trigger guard for trigger springs, pulling the bolt carrier group for extractor springs, and depressing the buffer retainer for buffer springs. Use proper punches and work on a padded surface.
How This Affects Longevity
AR-15 springs wear out over time and can cause malfunctions like light primer strikes, extraction failures, or short cycling. Regular spring replacement maintains reliability and extends component life. Different springs have different replacement intervals based on round count and usage patterns.
The Detail
The most commonly replaced springs in an AR-15 are the trigger springs, extractor spring, ejector spring, and buffer spring. Start with the trigger springs by removing the trigger guard and carefully noting the position of each spring before removal. The hammer spring provides the force for primer ignition, while the trigger return spring controls trigger reset. Use proper slave pins to keep disconnector springs in place during reassembly.
For bolt-related springs, remove the bolt carrier group and extract the bolt from the carrier. The extractor spring sits behind the extractor and often includes a rubber insert or buffer. Remove the extractor pin carefully to avoid launching small parts across your workspace. The ejector spring requires depressing the ejector while removing its retaining pin. These springs directly affect case extraction and ejection reliability.
The buffer spring replacement requires removing the stock and buffer tube. Depress the buffer retainer carefully as the spring is under compression. Buffer springs lose tension over time and cause short cycling issues. When installing the new spring, ensure proper orientation and that the buffer moves freely without binding. The gas tube spring, if present, simply slides over the gas tube and requires no special tools.
Always verify proper function after spring replacement by cycling the action manually and checking trigger reset, bolt lock-back, and safety operation. Springs should be replaced as sets when possible to maintain consistent timing and force distribution throughout the system.
Build Impact
Spring quality directly affects reliability, so invest in quality replacement springs from established manufacturers rather than bargain options. Keep a spare spring kit on hand since springs are wear items that will eventually need replacement based on your shooting schedule.