Enhanced AR 15 Buffer Spring

About this product

Here’s your clean, factual product description:

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A proper buffer spring isn’t just about recoil management—it’s what keeps your AR cycling reliably when you’re running suppressed, rapid-fire, or tuned setups. The Enhanced AR-15 Buffer Spring from Rare Breed Triggers delivers consistent performance without the fatigue of standard springs.

What you get

• Precision-wound spring steel construction for consistent tension
• Optimized coil spacing to reduce harmonic vibration
• Extended service life (tested to 10,000+ cycles)
• Compatible with carbine, rifle, and A5 buffer systems
• Made in the USA with MIL-SPEC materials

Build and finish

Rare Breed’s spring uses ASTM A228 music wire—the same material found in aerospace applications—with a proprietary heat treatment that prevents coil bind under rapid cycling. The black oxide finish isn’t just cosmetic; it reduces friction against buffer tubes while resisting corrosion from solvents and sweat.

Unlike budget springs that lose tension after a few thousand rounds, this unit maintains ±5% force variance throughout its lifespan. The closed-loop ends are ground flat to prevent burrs from damaging your buffer retainer pin, a detail often overlooked in mass-produced springs.

Compatible platforms

• AR-15/M4 pattern rifles (5.56/.223)
• 9mm PCC builds with compatible buffer systems
• .300 BLK setups (suppressed or unsuppressed)
• FRT-15 and other forced-reset trigger configurations

Installation notes

No gunsmithing required—swap it like any standard buffer spring. Works with aluminum and steel buffer tubes. Pair with an H2 or H3 buffer for suppressed setups to minimize bolt carrier group velocity.

Whether you’re building a Polymer80-based PDW or tuning a competition rifle, this spring eliminates one more variable in reliability. It’s the kind of component that disappears into your build—until you notice your malfunctions disappeared first.

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