Sprinco Usa Spring Kit-Xp Buffer Spring W/ Dual Extractor Springs

The Sprinco USA Spring Kit-XP Buffer Spring with dual extractor springs is a heavy-duty bolt carrier group tuning solution for shooters running larger calibers and overgassed rifle builds. Built around an orange extra-power buffer spring significantly stiffer than Sprinco's standard red spring, this kit addresses the specific demands of .308 Winchester, 6.5 Creedmoor, .260 Remington, and similar magnum cartridges in AR-10 and AR-pattern platforms where gas tube pressure and spring rate need aggressive management.

The XP spring was originally developed for heavy bolt carrier groups paired with standard 7-inch M4 extension tubes and 2.5-inch buffers in mid-length and rifle-length gassed 16- to 18-inch carbines. It's proven equally effective for tuning overgassed rifles of any major caliber—including 5.56 NATO builds—running longer 3.25-inch buffers in AR-10 platform tubes. If your rifle short-cycles, batters itself under recoil, or shows inconsistent extraction, an upgrade in spring rate is often the first tuning step before adjusting gas blocks or adding mass to your buffer.

This kit includes the robust orange buffer spring plus dual extractor springs, giving you the core components needed to dial in your action's reliability and shot-to-shot consistency. It's a straightforward, field-proven approach favored by precision shooters, hunters running larger magnums, and builders who understand that a properly tuned spring rate pays dividends downrange and at the bench.

Key Features

• Heavy-duty orange buffer spring engineered for magnum calibers and heavy bolt carrier groups
• Includes dual extractor springs for complete action tuning
• Designed for standard 7-inch M4 extension tubes with 2.5-inch buffers
• Compatible with longer 3.25-inch buffers in AR-10 platforms
• Proven for both mid-length and rifle-length gassed carbines
• Effective tuning solution for overgassed rifle builds

Specifications

Frequently Asked Questions

Will the XP buffer spring work with my AR-10?

Yes. The orange XP spring is engineered for AR-10 platforms using longer 3.25-inch buffers and fits standard AR-10 pattern extension tubes. It's also compatible with AR-15 rifles using standard 7-inch M4 tubes.

What calibers does this kit support?

The XP spring was developed for .308 Winchester, 6.5 Creedmoor, and .260 Remington in heavy bolt carrier group builds. It's also effective for tuning overgassed rifles in 5.56 NATO and other equivalent calibers.

When should I upgrade to a heavier buffer spring?

Consider upgrading if your rifle short-cycles, exhibits heavy recoil impulse, or shows extraction inconsistencies. Spring rate is typically the first tuning variable before adjusting gas block position or buffer weight.

What's included in the kit?

The Sprinco USA XP kit includes the orange extra-power buffer spring and dual extractor springs, providing the essential components to tune your bolt carrier group and extraction system.