Wolff Gunsprings Factory Standard 12 Lb Recoil Spring & Extra Power Firing Pin Spring for H&K USP, 49512

Restore factory slide dynamics and ignition reliability with this Wolff OEM-grade spring set for H&K USP pistols. The kit pairs a factory-standard 12 lb. recoil spring with an extra-power firing pin spring so the slide return rate matches factory intent while striker energy is refreshed for consistent primer strikes; ideal when servicing a duty or range gun.

Why it matters: A correct recoil spring maintains reliable feeding, extraction, and slide timing; a fresh, stronger firing-pin spring helps avoid light strikes that can arise from worn ignition components. Together they preserve safe, predictable function and extend service life under heavy use. Factory-matched slide spring with a stronger firing-pin spring to keep your USP running reliably under duty or high-round use.

Features:

• Recoil spring: Nominal 12-lb factory-standard rate to maintain OEM slide timing.
• Firing-pin spring: Extra-power spec to restore striker energy and reduce light strikes.
• Wolff quality: Precision wound, heat-treated spring steel for consistent rates and long life.
• Direct replacement: Designed for H&K USP series, drop-in fit with no permanent modifications.

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Note: NDZ always recommends any part be installed by a qualified and trained gunsmith. NDZ promotes the use or safety practices and gear when working on any firearm.