
Availability: In Stock
The Sprinco USA Spring Kit with standard buffer and 4-coil bolt extractor spring is built for AR-15 owners who want a reliable, worry-free replacement for a worn or sluggish action. If your carbine's performance has drifted from its early days—slower bolt lock-back, mushy trigger feel, or sluggish extraction—a fresh buffer spring can restore that crisp, consistent cycling you remember. This kit pairs a standard-power buffer spring with a 4-coil bolt extractor spring to address both the recoil impulse and the extraction cycle, giving you a complete tune-up without chasing exotic performance upgrades.
Sprinco designed this spring to match the spring load of a brand-new Mil-Spec M4 carbine spring, so if you've run your rifle hard or simply want to return it to factory-fresh function without the guesswork of frequent swaps, this is a straightforward solution. It works reliably in any properly maintained 5.56 carbine that runs a standard buffer tube and bolt carrier group. Whether you're a purist who prefers to keep your rifle as the manufacturer intended or a practical shooter who values consistency over exotic tweaks, this kit lets you reset your action to known, predictable performance.
Installation is straightforward for anyone comfortable working on their AR platform rifle. Once installed, you'll notice the difference immediately: snappier bolt lock-back on empty, cleaner extraction, and that positive feel of a spring that's not fatigued. It's the kind of maintenance item that doesn't grab headlines but absolutely matters to shooters who value reliability and repeatability at the range or in the field.

SKU: 197559406 • Weight: 0.16oz





Availability: In Stock
The Sprinco USA Spring Kit with standard buffer and 4-coil bolt extractor spring is built for AR-15 owners who want a reliable, worry-free replacement for a worn or sluggish action. If your carbine's performance has drifted from its early days—slower bolt lock-back, mushy trigger feel, or sluggish extraction—a fresh buffer spring can restore that crisp, consistent cycling you remember. This kit pairs a standard-power buffer spring with a 4-coil bolt extractor spring to address both the recoil impulse and the extraction cycle, giving you a complete tune-up without chasing exotic performance upgrades.
Sprinco designed this spring to match the spring load of a brand-new Mil-Spec M4 carbine spring, so if you've run your rifle hard or simply want to return it to factory-fresh function without the guesswork of frequent swaps, this is a straightforward solution. It works reliably in any properly maintained 5.56 carbine that runs a standard buffer tube and bolt carrier group. Whether you're a purist who prefers to keep your rifle as the manufacturer intended or a practical shooter who values consistency over exotic tweaks, this kit lets you reset your action to known, predictable performance.
Installation is straightforward for anyone comfortable working on their AR platform rifle. Once installed, you'll notice the difference immediately: snappier bolt lock-back on empty, cleaner extraction, and that positive feel of a spring that's not fatigued. It's the kind of maintenance item that doesn't grab headlines but absolutely matters to shooters who value reliability and repeatability at the range or in the field.
SKU: 197559406 • Weight: 0.16oz
