ISMI S&W M&P Chrome Silicon Flat Wire Recoil Spring

Flat wire recoil springs designed to be used on the factory guide rod or any after-market guide rod with an outer diameter under .255″. Manufactured from Chrome Silicon alloy and designed to perform beyond 20,000 compression cycles. Multiple spring rates available to enable tuning of the M&P for optimum performance.

Not for use in .45 ACP models.

Available in: 11, 13, 15, 17, and 20lb variants