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A tired ejector spring is one of those small parts that can quietly wreck a good range day. When it loses tension, spent cases stop clearing the port cleanly and you start chasing stovepipes and weak ejection. Sprinco's Enhanced Super Duty Ejector Spring is built to keep that from happening. Each spring is wound from chrome silicon wire that's heat treated, stress relieved, and cryogenically processed after winding, then plated with a re-micronized molybdenum disulfide coating. The result is a spring that matches the load of a fresh Mil-Spec unit and holds that pressure through a long duty cycle instead of fading out over thousands of rounds.
This spring drops into the standard AR-15 and M16 bolt, seating behind the ejector and giving the plunger the force it needs to kick brass out the ejection port. What sets Sprinco apart is staying power. Where a factory spring gradually sets and softens, this one keeps positive, consistent ejection even when things get hot and dirty. That heat resistance is real too, with performance holding steady up to 750 degrees Fahrenheit, which matters on suppressed guns, SBRs, and anything running a hot gas system.
The standard power rating is a good match if you want the reliability of a brand-new spring load without over-tuning your bolt. Most builders swap the ejector spring during a full bolt rebuild or when doing preventative maintenance in the 3,000 to 10,000 round range, so having three on hand covers you for a while. Toss one in your current build, set the others aside for spares, or spread them across a few rifles. It's a cheap, quick fix that punches way above its size.
These springs have earned a solid reputation with duty rifle builders, competition crowds, and folks who tune 300 Blackout guns that run wide pressure ranges. If you're building a bolt or freshening up a rifle that's seen some rounds, this is one of the easiest upgrades to feel good about.
It matches the load of a brand-new Mil-Spec spring, but it's built to hold that pressure much longer. The chrome silicon wire is heat treated, stress relieved, and cryogenically processed, then plated with a moly disulfide coating, so it resists the fatigue and set that soften ordinary factory springs over time. In short, it starts at Mil-Spec force and stays there through a long duty cycle.
Yes, it's designed for standard AR-15 and M16 bolt assemblies and drops in as a direct replacement for the factory ejector spring. If you're running a standard bolt carrier group, it seats behind the ejector just like the original. It's a common swap on new builds and bolt rebuilds.
A good rule of thumb is to inspect and replace it during a full bolt rebuild, often somewhere in the 3,000 to 10,000 round range, or at the first sign of weak or erratic ejection. Since this is a 3-pack, you'll have spares ready for future maintenance. Swapping a tired ejector spring is cheap insurance against stovepipes and sluggish brass ejection.
The standard power spring gives you fresh Mil-Spec ejection force with excellent staying power, which works well across a range of setups including suppressed guns and SBRs. Its heat resistance up to 750 degrees Fahrenheit helps it hold performance when the gas system runs hot. Builders tuning platforms like 300 Blackout that see wide pressure swings tend to reach for Sprinco springs for that reason.
| UPC | 657780270033 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 27003 |
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