ISMI Magazine Spring for Smith & Wesson Shield .45 for 6 rd Magazine Plus 10%

Designed to fit Smith & Wesson Models: Shield.    Caliber: .45 ACP. (6 Round Magazine).

Boost your magazine reliability with the ISMI +10% Extra Power Magazine Spring for Smith & Wesson Shield .45 ACP 6-round magazines. Whether you're running extended base plates or replacing a fatigued factory spring, this high-performance upgrade delivers increased feeding power and improved cycling under stress. Constructed from certified chrome silicon aerospace alloy ISMI springs are heat-treated, shot-peened, and stress-relieved after winding; resulting in superior strength, consistency, and a service life up to 10x longer than standard music wire springs. These springs maintain tighter tolerances under repeated compression, ensuring consistent ammo feed and dependable last-round lock-back. Modern spring technology for serious carry gear, only at NDZ Performance.

Features:

• +10% extra power magazine spring for Shield .45 6-round mags.
• Ideal for use with extended base plates or worn OEM springs.
• Increases feed force for improved reliability.
• Made from certified aerospace-grade chrome silicon.
• Heat-treated, shot-peened, and stress-relieved for long life.
• Withstands extreme cycling, built using race-grade tech.
• Designed to maintain tight tolerances under heavy use.

Note: New springs may require a brief break-in period before full capacity becomes easier to load—especially in low-capacity mags without extensions.

See our complete line of Smith & Wesson Shield Products here

Disclaimer: "GLOCK" is a federally registered trademark of Glock, Inc. or Glock Ges.m.b.H. NDZ Performance has NO affiliation in any manner with, or otherwise endorsed by, Glock, Inc. or Glock Ges.m.b.H. The use of the word "GLOCK " on this page is merely to identify which firearm these parts or components are compatible with.

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.