AR-15 Buffer Retainer Spring
The United Defense AR-15 Buffer Retainer Spring is a mil-spec replacement spring that sits beneath the buffer retainer pin at the rear of the lower receiver. It supplies the upward tension that holds the retainer in position, keeping the buffer and recoil spring locked inside the buffer tube during cycling. Wound from heat-treated spring steel and built to standard dimensions, it drops into any AR-15, M16, or AR-10 lower without fitting. A smart spare for builders, armorers, and any shooter who keeps a stocked parts box.
In stock
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- SKU
- N8448583
$1.95
Description
Features
- Mil-Spec Dimensions — Manufactured to mil-spec tolerances for a drop-in fit in any standard AR-15, M16, or AR-10 lower receiver.
- Consistent Tension — Calibrated spring rate keeps the buffer retainer pin firmly seated against the buffer to prevent slip-by during cycling.
- Hardened Steel Construction — Wound from heat-treated spring steel to resist fatigue, compression set, and corrosion over thousands of cycles.
- Direct Replacement Part — Restores function on rifles where the original retainer spring has been lost, kinked, or weakened from use.
- Compact Footprint — Drops straight into the buffer retainer detent hole at the rear of the lower receiver with no fitting required.
- Carbine and Rifle Compatible — Works with carbine-length and rifle-length buffer tubes across the entire AR-15/M16 platform.
- Essential Build Component — A must-have for any AR lower parts kit, spare-parts box, or armorer's bench.
- United Defense Quality Control — Inspected for proper free length and spring rate before packaging to ensure reliable performance.
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Customer Reviews
Top customer reviews
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THANKS KSCheapest price anywhere that was in stock. Delivery was speedy with Fedex.
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GoodLowest price anywhere that was available. Delivery was fast with Fedex.
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Just as pictured.Lowest price I could find that was in stock. Delivery was quick with UPS.
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Good for meReceived in two days after placing my order. Will be back to buy from keepshooting again.
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Awesome ManufacturingThese AR15 buffer retainer spring are awesome. Would recommend.
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