ISMI Magazine Spring for Sig Sauer P320 X5 M17 M18 - 17 & 21 Round Magazines, Plus 10%

Fits Sig Sauer Models: P320, X5, M17, & M18 - 17 & 21 Round Magazines Only.

Upgrade feed reliability for high-capacity P320 magazines with a Plus 10% power magazine spring by ISMI. This Extra Power Spring gives your 17 and 21-round Sig Sauer P320/X5/M17/M18 magazines more upward force to reliably present rounds when you’ve added extensions, heavier followers, or as a replacement when the factory spring has worn. Upgrade your P320 with the best parts on the market available at NDZ Performance.

Features:

• Fixes weak-feed symptoms: Adds the extra push needed when running extended baseplates, aftermarket followers, or worn magazines.
• Tuned, not overdone: +10% spring force targets improved feeding without excessive muzzle dip or unnecessary slide strain when used correctly.
• Racing-grade tech: Manufactured from chrome-silicon aerospace alloys, heat treated, shot-peened, and stress-relieved for consistent performance and long life.

See our complete line of Sig Sauer P320 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: "Sig Sauer" is a federally registered trademark of SIG Sauer, Inc. or SIG Sauer GmbH & Co.KG. NDZ Performance has NO affiliation in any manner with, or otherwise endorsed by, SIG Sauer, Inc. or SIG Sauer GmbH & Co.KG. The use of the word "Sig Sauer " on this page is merely to identify which firearm these parts or components are compatible with.