ISMI Sig Sauer P365 12 Round Magazine Spring Plus 5%
Upgrade feed reliability in your Sig P365 with a precision-wound +5% power ISMI magazine spring made for 12-round magazines from NDZ Performance. Built from durable chrome-silicon and finished with motorsport-level processes; this spring delivers more consistent upward force, longer life, and predictable compression compared to stock music-wire springs. Find the best components to upgrade or repair your Sig pistol at NDZ Performance.
Features:
- Corrects weak-feed symptoms when using extensions, heavier followers, or worn magazines.
- Tuned lift (+5%): Extra force without excessive muzzle dip when installed correctly.
- Longevity & stability: Chrome-silicon alloy resists relaxation and holds tolerances far longer than music-wire springs.
- A spring that’s too light causes misfeeds; one that’s too heavy can increase muzzle dip or affect timing. If unsure, consult a qualified armorer.
NDZ Performance is ISMI's exclusive vendor for P365 Magazine Springs!
See our complete line of Sig P365 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.
Brand: ISMI
Type: Magazine Spring
Model: Plus 5% 12 Round Magazine Spring
Country/Region Of Manufacture: Made In USA
UPC: Does Not Apply
NDZ Custom Kit: No
Material: Chrome Silicon
Texture: Smooth
For Gun Make: Sig Sauer
For Gun Model: P365
Caliber: 9mm, .40 Caliber
| Gun Make | Sig Sauer |
|---|---|
| Product Type | Magazine Spring |
| Product Model | Plus 5% Power |
| Product Material | Chrome Silicon |
| Gun Model | P365 |
| Capacity | 12 Rounds |
11 Reviews Hide Reviews Show Reviews
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Great Experience
I always have a great experience with NDZ. Orders are always shipped fast.
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Wrong order
(9/3/22) I ordered the wrong size magazine springs(2) a 10 round instead of a 12 round for my p365x. I sent two emails to ask to exchange and I received no reply. So I bought the 12 round springs and now I have a set of 10 round. So if you need them let me know. John <br><br> <b>NDZ Administrator Note (September 13th, 2022)</b><br><br> Hello John, we show no contact from you. As long as the parts meet the requirements for return you are more than welcome to send them back for a refund. Thank you. -Team NDZ! <br><br> If you have any further questions, comments, or concerns, please feel free to reach out to us through either E-Mail: Sales@NDZPerformance.com or through Phone: 203-439-7784 Ext. 127, or leave a quick message on our Contact Us page that will directly email our Customer Service Department. <br><br>Thank you for your honest review and shopping with NDZ Performance.
