ISMI Sig P320 Full-Size Recoil Spring

Designed to fit Sig Sauer Models: P320 Full-Size - 4.7" Barrels, P320 Full-Size, P320 XFull, P320 M17.

Does Not Fit: P320 M.O.D., P320 Max 2.0, P320 SXG, P320 Max SXG, P320 Flux Legion, P320 XFIVE SXG, P320 AXG Legion, P320 XFIVE Legion, P320 XFIVE DH3, 5 Inch Barrels, 3.9 Inch Barrels, all other models not listed.

Dial in your P320’s recoil performance with ISMI’s premium flat wire recoil springs, engineered for serious shooters who demand long-lasting reliability and smoother cycling. Crafted from chrome silicon, these springs deliver up to 10x the service life of standard music wire, making them ideal for high-round count setups. Each spring is heat treated, shot peened, and stress relieved to ensure consistent performance under heavy use. Compatible with full-size Sig Sauer P320 models. Pair with an NDZ Guide Rod for a full-performance upgrade.

• Springs available in 13 lb., 15 lb., 17 lb., 20 lb., 22 lb., & 24 lb. weights, as well as a convenient tuner pack that contains all except for the 13 lb.
• Chrome silicon construction: 10x longer life than standard springs.
• Heat treated, shot peened, and stress relieved.
• Made in the USA.

Note: The 13 lb. recoil spring is not available in the tuner pack and can only purchased as a single spring. It is designed to be used in pistols with modified striker and trigger springs.

See our Sig Sauer P320 Full-Size Guide Rods here

See our 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.