Strike Industries AR Ultimate Dust Cover for .308

Item Code: AR-UDC-E-308
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  • Lightweight and Durable Polymer Construction
  • WIll Never Corrode, Rust or Fade
  • Built-In Adjustable Detent Set Screw
  • Will Never Deform or Get Bent Out of Shape
  • Detail
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    The SI AR Ultimate Dust Cover is constructed of a high-density polymer for a more durable and functional dust cover. The features an adjustable detent set screw in order to compensate wear on the receiver and increase or decrease opening power.


    • Spring-loaded internal detent rod for easy installation and take-down.
    • Constructed with lightweight durable polymer material
    • Will never corrode rust or fade
    • Will never deform or get bent out of shape
    • Comes in a variety of designs
    • True Seal internal lip that seals the port tighter than traditional dust cover designs.
    • Built-in adjustable detent set screw to compensate for wear on the receiver.
    • Available for AR-15 and AR-10

    Package includes:

    • 1x Dust Cover
    • 1x Spring
    • 1x Pin

    We strongly recommended applying blue Loctite threadlocker to the ball-detent thread after being adjusted.

    WARNING: Modifications are made at your own risk; Modified UDC's will NOT be accepted if returned.

    COMPATIBILITY: Due to no Mil-Spec standards for AR-10 upper receivers, the SI Ultimate Dust Cover for .308 will require fitment by user with light filing/sanding.

    NOT COMPATIBLE: The SI .308 UDC is not guaranteed to fit all receivers nor be able to be modified to fit due to there being no standard for the AR10 platform.

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    WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to

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