Angel Custom Advanced Precision APS / APS2 / Type 96 / M99 500 FPS SP170 Tune Up Kit

When it comes to airsoft sniping, precision and consistency are everything. Whether you’re building a long-range DMR or pushing your bolt-action rifle to peak performance, the Angel Custom Advanced Precision SP170 Tune Up Kit is engineered to deliver the power, durability, and smooth operation that serious marksmen demand. Designed specifically for APS and APS2-based systems, this upgrade kit offers a high-performance solution for players who want their sniper rifle to reach its full potential.

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Built with Precision – 100% CNC Machined Components

Every part of this upgrade kit is crafted using 100% CNC milling technology for maximum precision and structural integrity. Unlike cheaper cast or pressed alternatives, CNC machining ensures that every cut, angle, and measurement is exact. This results in smoother operation, less wear over time, and a consistent level of performance shot after shot. For snipers who rely on reliability under pressure, this level of craftsmanship is invaluable.

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SP170 High Power Spring – 480 to 550 FPS

At the heart of the kit is the Carbon Steel SP170 Power-Up Spring, designed with an irregular pitch to minimize resistance and provide smoother compression and decompression. This advanced design allows for easier bolt pull while still outputting an impressive 480–550 FPS, depending on rifle setup and internal tuning. The spring is oil-tempered and treated for high pressure, giving it the durability needed for prolonged use in demanding conditions.

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Lightweight, High-Strength Materials

The kit is built from premium materials to balance strength with efficiency. The spring guide is constructed from T6 aluminum, a high-grade aerospace alloy chosen for its lightweight durability and resistance to stress. Combined with the carbon steel piano wire spring, this kit provides a blend of resilience and performance that ensures long service life without compromising power output.

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Smooth Operation for Consistent Accuracy

Snipers know that internal friction and inconsistent cycling can ruin accuracy. That’s why this kit is designed for smooth internal operation, reducing resistance and optimizing every aspect of the bolt pull and release. The result is a crisp, reliable firing cycle that helps deliver improved consistency at long ranges. If you’re upgrading from stock internals, you’ll notice a significant improvement in both stability and shot-to-shot reliability.

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Wide Compatibility Across APS Platforms

The Angel Custom SP170 Tune Up Kit is compatible with a wide range of APS-based rifles, making it a versatile upgrade for many platforms. It works seamlessly with:

• Maruzen APS2

• Type 96 Series

• Shadow Ops MB-01 / MB-03 / MB-05

• M99 / LRSA / Javelin M24

• Snow Wolf, WELL, and UTG rifles using APS internals

⚠️ Note: This kit is not compatible with AGM APS2 rifles or VSR-10 system platforms, as they use a different internal system.

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Why Choose Angel Custom?

Angel Custom is a brand built by passionate Airsofters for Airsofters. Every product is battle-tested and field-ready, designed to give players an edge where it matters most. With years of experience creating high-quality upgrade parts, Angel Custom has become a trusted name in performance and reliability. The SP170 Tune Up Kit is no exception—engineered for those who demand more from their rifles, it’s a must-have upgrade for serious snipers.

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Key Benefits of the Angel Custom SP170 Tune Up Kit

• Boosts FPS performance into the 480–550 range.

• CNC precision machining ensures durability and accuracy.

• Smooth cycling reduces stress on internals and enhances consistency.

• Lightweight yet strong materials maximize efficiency.

• Broad compatibility with APS / APS2-based sniper rifles.

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Final Thoughts

If you’re ready to take your sniper rifle to the next level, the Angel Custom Advanced Precision SP170 Tune Up Kit is the ultimate upgrade. Combining precision CNC craftsmanship, a high-performance power-up spring, and lightweight yet durable components, it provides the perfect balance of power and reliability. Whether you’re hitting targets at extreme ranges or competing in a milsim event, this kit ensures your rifle performs at its best every single time.

Upgrade with confidence. Angel Customize it.