AR-15 Hammer Spring
The AR-15 Hammer Spring is a MIL-Spec replacement spring for the fire control group of any standard AR-15, M16, or M4 platform. Manufactured from heat-treated spring steel, it delivers the consistent hammer-fall energy required to reliably ignite both military and commercial primers. The classic double-coil J-spring geometry seats around the trigger pin and powers the hammer through every trigger cycle. Keep one in your build kit, armorer's bag, or range pack as an essential spare for AR-15 builders, gunsmiths, and serious shooters.
In stock
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- SKU
- N9349107
$2.95
Description
Features
- MIL-Spec Replacement — Drop-in replacement hammer spring built to MIL-Spec dimensions for the AR-15 fire control group.
- Hardened Steel Construction — Made from heat-treated spring steel for consistent tension and a long service life.
- Reliable Primer Ignition — Delivers the hammer strike force needed to set off hard military and commercial primers without light strikes.
- Double-Coil J-Spring Design — Traditional twin-leg geometry seats around the trigger pin and properly powers the hammer through every cycle.
- AR-15 / M16 / M4 Compatible — Fits standard AR-15, M16, and M4 lower receivers using MIL-Spec fire control components.
- Armorer-Grade Spare — Smart addition to any range bag, build kit, or spare parts kit for fast field repairs.
- Corrosion-Resistant Finish — Protective finish guards against rust and wear inside the lower receiver.
- Builder-Friendly — Ideal for new AR-15 builds, lower parts kit rebuilds, and worn-spring replacements.
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Customer Reviews
Top customer reviews
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Exactly what my BCG neededPicked up a couple of these to have on hand as spares. Dropped one in my budget build and reset feel is crisp, no complaints. Mil-spec is mil-spec, does exactly what it supposed to do. Shipping was fast too, had it in 3 days which was a nice suprise.
Good price for a spare parts stash
Nothing fancy, just a spring
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Good replacement partThe spring itself seems well made and installed without any hassle.
MIL-SPEC
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A reliable, essential replacement partThis spring fixed the light strike issues I was having with my rifle. It dropped right in and works perfectly.
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out with the old, in with the new!These are a must have for anybody really. Especially if you keep a round in the chamber for long periods of time or just like leaving your hammer in the back position. Doing that will decrease your spring's strength over time. Besides that, normal use can wear them out and you can always use a back up!
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good replacement partsthis spring was a nice replacement for the old worn out one thanks KS.com
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