Wolff Extra Power Magazine Spring for S&W M&P Shield EZ .380 ACP
Part Number: 78991
Enhance your Smith & Wesson M&P Shield EZ .380's magazine reliability with this premium Wolff +10% extra power magazine spring. Specifically designed for the 8-round Shield EZ .380 magazine, this spring delivers improved feeding and consistent performance shot after shot.
⚠️ IMPORTANT COMPATIBILITY NOTE: This spring is designed ONLY for the M&P Shield EZ .380 (both 1.0 and M2.0) with 8-round magazines. NOT compatible with standard Shield, Shield Plus, or Shield EZ 9mm models - the EZ series has a unique magazine design.
Key Features:
- +10% Extra Power: Enhanced spring tension for reliable feeding and reduced malfunctions
- EZ-Specific Design: Engineered specifically for the Shield EZ .380's unique magazine system
- Premium Quality: Made in USA by Wolff GunspringMakers with over 75 years of expertise
- Easy Installation: Direct drop-in replacement for factory magazine springs
- Corrosion Resistant: High-quality spring steel with protective finish
- Consistent Performance: Maintains proper tension through thousands of cycles
Spring Comparison Chart:
| Spring Type | Power Level | Best For | Benefits |
|---|---|---|---|
| Factory Standard | 100% | General use | OEM specifications |
| Wolff +10% XP | 110% | Carry, duty, self-defense | Maximum reliability, consistent feeding, reduced failures |
Which Shield EZ Do I Have?
The Shield EZ series is designed for easy operation with features like an easy-to-rack slide and easy-to-load magazine. Here's how to identify your model:
- Shield EZ .380 (1.0): Original EZ model chambered in .380 ACP. Uses 8-round magazines. This spring fits perfectly.
- Shield EZ .380 M2.0: Updated model with improved features. Uses same 8-round magazines as 1.0. This spring fits perfectly.
- Shield EZ 9mm: 9mm version of the EZ (NOT compatible with this spring - different caliber and magazine design)
- Standard Shield: Original Shield models without EZ features (NOT compatible - completely different magazine design)
Still not sure? If your pistol is chambered in .380 ACP and has the easy-to-rack slide feature, this spring will fit your 8-round magazines.
Technical Specifications:
- Spring Type: Magazine Spring
- Power Rating: +10% Extra Power
- Capacity: 8-Round Magazines
- Caliber: .380 ACP Only
- Material: Premium spring steel
- Finish: Corrosion-resistant coating
- Manufacturer: Wolff GunspringMakers (USA)
- Weight: 2 oz
Compatible Models:
This magazine spring fits the following Smith & Wesson pistols:
- M&P Shield EZ .380 ACP (1.0) - 8-round magazines
- M&P Shield EZ .380 ACP M2.0 - 8-round magazines
NOT compatible with: Shield EZ 9mm, standard Shield series (9mm/.40/.45), Shield Plus series, aftermarket extended magazines
Installation Instructions:
- Safety First: Ensure firearm is unloaded and magazine is completely empty
- Disassemble Magazine: Remove base plate by depressing the locking tab and sliding it off
- Remove Components: Carefully remove the follower and existing spring
- Install New Spring: Insert the Wolff spring with smaller coils positioned at the bottom
- Reassemble: Replace follower and base plate, ensuring proper locking engagement
- Function Test: Load a few rounds to verify smooth feeding and proper operation
Pro Tip: The Shield EZ is designed for easy loading, but the +10% spring still maintains easy operation while providing enhanced reliability. The entire installation takes less than 2 minutes per magazine.
Frequently Asked Questions:
Q: How often should I replace my magazine springs?
A: For carry and self-defense magazines, we recommend replacing springs annually or every 5,000-10,000 rounds. For range magazines, replace when you notice feeding issues or every 2-3 years.
Q: Will this work with aftermarket magazines?
A: This spring is designed for OEM S&W Shield EZ magazines. While it may fit some aftermarket magazines, we cannot guarantee compatibility with non-OEM products.
Q: What's the difference between +10% and factory springs?
A: The +10% extra power spring provides more tension than the +5% springs used in other Shield models, which improves feeding reliability with .380 ACP ammunition. It's ideal for carry and self-defense use.
Q: Will the extra power make it harder to load rounds?
A: The Shield EZ is specifically designed for easy loading, and the +10% spring maintains this ease of use while providing enhanced reliability. Most shooters don't notice a significant difference in loading effort.
Q: Why is this +10% instead of +5% like other Shield springs?
A: The .380 ACP cartridge and the Shield EZ's unique design benefit from the additional spring tension to ensure reliable feeding, especially with various ammunition types.
Q: Do I need to replace all my magazine springs at once?
A: Not necessarily, but many shooters replace springs in all their carry magazines at the same time to maintain consistent performance across all magazines.
Why Choose Wolff Springs?
Since 1948, Wolff has been America's premier manufacturer of precision firearm springs. Their extra power magazine springs are engineered to exacting tolerances, providing enhanced reliability for concealed carry, self-defense, and range training. Trusted by competitive shooters, law enforcement, and responsible gun owners worldwide.
Warranty & Returns:
Wolff springs are backed by the manufacturer's quality guarantee against defects in materials and workmanship. All products are eligible for return within our standard return policy period if unused and in original condition.
Frequently Bought Together:
- OEM Shield EZ .380 magazines (8-round)
- Magazine followers and base plates
- Other Shield EZ .380 parts and accessories
- Wolff recoil springs for Shield EZ
Package Contents: 1 Wolff +10% Extra Power Magazine Spring for 8-round magazines
Bulk Pricing Available: Need multiple springs? Many customers purchase 2-5 springs to service all their magazines at once. Contact us for quantity pricing on orders of 10 or more.
Maintenance Tip: Keep spare springs on hand for preventive maintenance. The Shield EZ .380 is a popular choice for those who prefer easy operation - keep your magazines in peak condition for reliable self-defense performance!