Smith & Wesson CSX ISMI Recoil Springs

Tune or replace your CSX's recoil system with ISMI springs from NDZ Performance. Available in Stock, +10%, and -10% spring weights; these precision springs let you restore factory timing or dial slide velocity to match ammo, suppressors, or personal preference. ISMI springs are wound from aerospace-grade chrome-silicon; then heat-treated, shot-peened and stress-relieved to hold tight tolerances and resist fatigue. That engineering, the same discipline used in high-performance motorsports; yields longer life, consistent spring rates, and predictable slide timing compared with ordinary music-wire springs. Get yours at NDZ Performance today!

Features:

• Restore factory function or fine-tune slide velocity for specific ammo/parts.
• Aerospace materials + racing-grade processing = longer life and stable performance.
• Precise tolerances reduce variance shot-to-shot for consistent lockup and reset.
• Simple swap, direct-fit for S&W CSX (confirm model/year before ordering).

Available Spring Weights:

• Stock weight: Factory-equivalent timing and reliability.
• Plus 10%: Slightly stiffer for heavier loads, suppressed/compensated setups, or to restore worn magazines/springs.
• Minus 10%: Lighter rate for competition or faster follow-ups with lighter loads and uncompensated barrels.

See our complete line of Smith & Wesson CSX Products here

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

DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by Smith & Wesson. Smith & Wesson does not warrant or represent that this product is compatible with Smith & Wesson pistols.