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AR-15/M16 EXTRA-POWER HAMMER SPRING Reviews & Ratings

Durable, steel springs provide extra hammer power to ensure proper ignition with each trigger pull. Replaces factory spring.

Note: For use in semi-auto models only. Not for use in full auto or burst fire models.

SPECS: Steel. Approximately 23/32" (18.2mm) wide, 2" (5.1cm) long.

See all of our AR15s and AR15 parts here.

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2 Stars

Reviews Summary

The Wolff extra-power hammer spring has received overwhelmingly positive feedback for its effectiveness in eliminating failure to fire issues across various AR platforms, especially with hard primer ammunition. Customers appreciate its reliability and ease of installation, although some note the increased trigger pull weight. Overall, it's a recommended upgrade for consistent ignition.

What Reviewers Are Saying

Reliability

90%

Many reviewers highlight the Wolff hammer spring's effectiveness in improving reliability, particularly with certain types of ammunition that have hard primers. Users reported instances of light strikes being resolved completely after installation, making this product highly regarded for ensuring consistent firing across different AR setups.

Ease of Installation

75%

The spring is praised for being easy to install, often compared to installing a standard mil-spec hammer spring. Several reviews indicate that it drops in easily without the need for special tools, which adds to user satisfaction and recommendation levels.

Increased Trigger Pull Weight

60%

Some customers note a noticeable increase in trigger pull weight after installing the heavier spring. While this may benefit reliability, it has led to mixed feelings among users who prefer lighter triggers for sensitivity. This aspect is especially highlighted by those using the spring in competitive shooting contexts.

Compatibility and Versatility

85%

Reviewers have used the spring across various AR platforms and calibers, including .22LR, 7.62x39, and .50BMG, indicating its versatility. Many emphasize that it resolves issues with different brands of ammunition, making it a go-to recommendation for others building or upgrading their firearms.

Value for Money

70%

Customers consider the Wolff spring a cost-effective solution to persistent firing issues, praising its reasonable price for the performance improvement it delivers. Many believe that investing in this product is worthwhile for anyone experiencing ignition problems, making it a solid investment in functionality.

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A must have for BRN-180 G 3

my 180 Gen 3 was not cyling properly after the 1st round and would jam, missfire, and not even load. This spring cured it.

by PABLO CLEMENA on June 27, 2026

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Oh boy! This did the trick!

I've been having isdues with a 22 magnim gas gun. I have be getting intermittent fail to fire. After trying several cartridge triggers and a mil-spec, i went back to mil-spec. Still was having isdues with JP Enterprises enhanced springs. I have these from Wolf Springs. No more fails to fire. (Side note: I've been using Wolf Springs for years in my rifles and handguns)

by GEORGE WILLIAMSON on March 29, 2024

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EXACTLY WHAT I NEEDED

I bought a dedicated .22 WMR AR upper receiver. My lower was standard GI Mil-Spec parts (nothing reduced power rayed) but I got +80% light primer hits with CCI Maxi-Mags. The Wolff extra power hammer spring was recommended to remedy the problem. I installed the new spring and was very happily surprised with 100% reliability. We found the exact same problem with my son's AR 22 LR upper, light hits on CCI Mini-Mags. The Wolff spring gave him 100% ignition reliability too.

by WILLIAM HARDT on November 09, 2023

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Perfect for rimfire

Picked up a couple of these and put them in the lowers I use with my 22lr dedicated upper. Was click no bang 50% with the milspec spring since installing 100% with good ammo. Nothing stet of "golden bullets" all the time.

by Mindgamez on August 10, 2023

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Works Great on Mil-Spec Trigger/Lower with a 7.62x39mm Upper

Over the years some alternate calibers and AR15’s don't have a strong enough hammer spring causing light strikes on the primers. it seems like 7.62x39mm is a great example of that this hammer spring being extra power XP helps to eliminate that issue as long as the trigger is a mil-spec trigger assembly, such an easy part swap and it does fix the issue.

I put one on every AR I can

I had problems with my first AR not firing some ammo so I installed one of these. It did the trick and I have made sure to add one to every AR I have ever had and I give them to my friends when they get an AR.

Hammer Spring, 10-Pak by WOLFF

must have if using ammo with hard primers solves the miss fire problem

Fixed light strikes

Used these to solve a light strike issue in a 7.62x39 ar. Had light strikes with wolf ammo. Changed to these hammer springs and the problem was solved.

Excellent Purchase: would recommend to f

I bought this product to upgrade the hammer on an AR in 7.62x39, for which the primers are usually a little stiffer than 5.56/.223, and while it does increase the trigger pull weight, I had no FTF or light strikes at all.

high tension

keeps the hammer positive to primer for positive primer ignition.