Wolff Extra Power Magazine Spring for S&W M&P Shield 9mm
Part Number: 78981
Enhance your Smith & Wesson M&P Shield 9mm's magazine reliability with this premium Wolff +5% extra power magazine spring. Designed to fit both 7-round and 8-round Shield 9mm magazines, this spring delivers improved feeding and consistent performance shot after shot.
⚠️ IMPORTANT COMPATIBILITY NOTE: This spring is designed for the original M&P Shield 9mm (1.0 and 2.0) with 7-round and 8-round magazines. NOT compatible with Shield Plus or Shield EZ series pistols - please see those specific product listings.
Key Features:
- +5% Extra Power: Enhanced spring tension for reliable feeding and reduced malfunctions
- Dual Capacity Fit: Works with both 7-round and 8-round Shield 9mm magazines
- 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 +5% XP | 105% | Carry, duty, competition | Enhanced reliability, consistent feeding, reduced failures |
Which Shield 9mm Do I Have?
Not sure if this spring fits your pistol? Here's how to identify your Shield model:
- Shield 9mm (1.0): Original model, released 2012. Uses 7-round and 8-round magazines. This spring fits perfectly.
- Shield 9mm M2.0: Updated model with improved trigger and grip texture. Uses same magazines as 1.0. This spring fits perfectly.
- Shield Plus: Newer higher-capacity model with 10/13-round magazines (NOT compatible with this spring - different magazine design)
- Shield EZ: Easy-to-rack slide model (NOT compatible with this spring - different magazine design)
Still not sure? Check your magazine capacity: If it holds 7 or 8 rounds of 9mm, this spring will fit both sizes.
Technical Specifications:
- Spring Type: Magazine Spring
- Power Rating: +5% Extra Power
- Capacity: 7-Round and 8-Round Magazines
- 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 9mm (1.0) - 7-round and 8-round magazines
- M&P Shield 9mm M2.0 - 7-round and 8-round magazines
NOT compatible with: Shield Plus series, Shield EZ 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: Slightly compress the spring before inserting the follower for easier installation. The entire process takes less than 2 minutes per magazine.
Frequently Asked Questions:
Q: How often should I replace my magazine springs?
A: For carry and duty 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 magazines. While it may fit some aftermarket magazines, we cannot guarantee compatibility with non-OEM products.
Q: What's the difference between +5% and factory springs?
A: The +5% extra power spring provides slightly more tension, which improves feeding reliability, especially with hollow-point ammunition or in dirty/adverse conditions. It's ideal for carry and duty use.
Q: Will the extra power make it harder to load rounds?
A: The difference is minimal - most shooters don't notice any significant change in loading effort, but the reliability improvement is substantial.
Q: Does one spring fit both 7-round and 8-round magazines?
A: Yes! This spring is designed to work perfectly in both 7-round and 8-round Shield 9mm magazines.
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, duty use, 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:
- Wolff recoil springs for Shield 9mm
- Wolff striker springs for Shield series
- OEM Shield 9mm magazines (7-round and 8-round)
- Magazine base plates and extensions
- Other Wolff Shield springs (.40 and .45 calibers)
Package Contents: 1 Wolff +5% Extra Power Magazine Spring (fits both 7-round and 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. Rotating springs between magazines can extend their service life and ensure you always have a backup ready. The Shield 9mm is one of the most popular concealed carry pistols - keep your magazines in peak condition!