- Ejector Spring
- Forward Assist Spring
- Port Cover Spring
- Extractor Spring
- Extractor Spring Buffer
The ERGO AR-15 Upper Receiver Spring Kit includes 5-piece all the factory-weight springs needed to finish building up a stripped upper receiver or refurbish an existing upper to like-new function. Replace worn, corroded, or fatigued springs before they fail-inexpensive insurance against game-ending stoppages caused by spring failure during competition or tactical operations.
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