ERGO Upper Parts Spring Kit
Model 4611 includes 5 springs
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.
Tags: AR, AR15, upper, spring kit, ergo
