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AR-15 Selector Detent Spring

The AR-15 Selector Detent Spring is the small but critical coil spring that loads the safety selector detent against the selector shaft, giving you that crisp, positive click between SAFE and FIRE. Made from hardened spring steel to mil-spec dimensions, it drops straight into any standard AR-15 or AR-10 lower receiver and is retained in place by the pistol grip. If your safety feels mushy, won't hold position, or you lost the original spring during a build, this is the part you need. A must-have for armorers, builders, and anyone keeping a spare parts kit on the bench.

In stock

SKU
N8448516
  $2.25
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Description

Features

  1. Mil-Spec AR-15 Replacement Part — Built to mil-spec dimensions to drop directly into any standard AR-15 or M16 lower receiver.
  2. Safety Selector Detent Spring — Provides the tension that holds the safety selector detent firmly against the selector body for positive, audible engagement.
  3. Hardened Steel Construction — Wound from heat-treated spring steel for consistent tension and long service life under repeated cycling.
  4. Precision-Wound Coils — Tight, uniform coil geometry delivers reliable spring rate and prevents binding inside the detent channel.
  5. Direct OEM Replacement — Drops in without modification to replace a worn, lost, or fatigued factory spring during builds or repairs.
  6. AR-15 and AR-10 Compatible — Works in both AR-15 and AR-10 pattern lowers that share the standard safety selector detent layout.
  7. Essential Armorer's Spare — Small, cheap, and easy to lose during disassembly — stock a few in your spare parts kit before you need one.
  8. Pistol Grip Retained — Captured between the lower receiver and the pistol grip, keeping the detent loaded against the selector at all times.

More Information

More From Brand
United Defense Products

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Customer Reviews

4.5

21 reviews

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Top customer reviews

  1. Stuart A.

    Great Item

    Overall Rating

    These parts are good. Would definitely buy again.
  2. Elaine A.

    Excellent

    Overall Rating

    Functions great as a spare selector detent spring for my AR15.
  3. Sebastian N.

    Good for my use

    Overall Rating

    Received in three days after placing my order. Will be back to buy at KS again!
  4. Rudolfo U.

    Great for my use

    Overall Rating

    Lowest price I could find that was online. Shipping was fast through Fedex.
  5. Leland S.

    Excellent Spare Part

    Overall Rating

    I purchased two of these selector detent springs. Used one for repair, other is spare.
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