Wolff Extra Power Magazine Spring for S&W M&P Shield .45 ACP
Part Number: 78951
Enhance your Smith & Wesson M&P Shield .45 ACP's magazine reliability with this premium Wolff +5% extra power magazine spring. Specifically designed for the 7-round Shield .45 magazine, this spring delivers improved feeding and consistent performance shot after shot.
⚠️ IMPORTANT COMPATIBILITY NOTE: This spring is designed for the original M&P Shield .45 (1.0 and 2.0) with 7-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
- Precision Fit: Engineered specifically for Shield .45 7-round 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 .45 Do I Have?
Not sure if this spring fits your pistol? Here's how to identify your Shield model:
- Shield .45 (1.0): Original model, released 2016. Serial numbers start with various prefixes. Uses 6-round and 7-round magazines.
- Shield .45 M2.0: Updated model with improved trigger and grip texture. Serial numbers typically start with "RFN" or "RFS". Uses same magazines as 1.0.
- Shield Plus: Newer higher-capacity model (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 6 or 7 rounds of .45 ACP, this spring will fit the 7-round version. We also carry the 6-round version (Part #78941).
Technical Specifications:
- Spring Type: Magazine Spring
- Power Rating: +5% Extra Power
- Capacity: 7-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 .45 ACP (1.0) - 7-round magazines
- M&P Shield .45 ACP M2.0 - 7-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: Can I use this in my 6-round Shield .45 magazine?
A: No, this is specifically for 7-round magazines. We carry the 6-round version separately (Part #78941).
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 magazine spring for 6-round Shield .45 magazines (Part #78941)
- Wolff recoil springs for Shield .45
- Wolff striker springs for Shield series
- OEM Shield .45 magazines (6-round and 7-round)
- Magazine base plates and extensions
Package Contents: 1 Wolff +5% Extra Power Magazine Spring for 7-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.