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Strike Industries Enhanced Ultimate Dust Cover Ejection Port Cover AR-15 Polymer

Product Overview

The Strike Industries Ultimate Dust Cover Ejection Port Cover is constructed of a high-density polymer making it more durable and functional than the traditional dust covers. The Ultimate Dust Cover features an adjustable detent set screw in order to compensate wear on the receiver and increase or decrease opening power.


  • Patent pending spring-loaded, internal detent rod for easy installation and take-down
  • Constructed with lightweight durable polymer material weighing in at only .3oz
  • Cut-out window for easy disassembly on any AR15 receiver
  • Will never corrode rust or fade
  • Will never deform or get bent out of shape
  • Comes in a variety of designs
  • Patent pending "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


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NOTE: Prices, specifications and availability are subject to change without notice. We reserve the right to correct typographic, photographic and/or descriptive errors.
Welcome to the premier source for Custom AR parts. We are fans, shooters, craftsmen, and most of all perfectionists. We strive to supply you with the best custom parts available anywhere in the world. We use state of the art lasers combined with our years of experience to make sure the parts we create for you are a work of art on their own. Every part we create must be good enough to go on our guns, or we won't ship it, guaranteed! We started with custom ar dust covers, and decided that wasn't enough, and went on to do charging handles, magazines, pmags, and more. Need your gun engraved? Not a problem, we have an FFL, so shoot us a message, we also engrave firearms (NFA/SBR Engraving as well!). Whatever you can imagine, we can create, so let our expert team truly make your rifle a stand out piece.
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SI Ultimate Dust Cover Review

Changing out your dust cover is a fairly simple and inexpensive way to add some character or a pop of color to your AR15. If you don’t know what you are doing, it can be a painful process though. Follow these simple steps to change out your dust cover.

In this article, we will be describing how to change our dust cover with a C clip.  Not all dust covers use these but they are the most popular.

How to Remove C Clip?

First, put a piece of tape under the front of the dust cover pin and on the front of your forward assist to protect the finish as you work on this project.

Next, locate the C clamp on the front of the dust cover pin.  It should be sitting in a small groove on the pin. Using two small screwdrivers, rotate the c clamp so the opening is facing you. Then, push down and out on the top and bottom of the c clamp at the same time and it should pop off. This C clamp is easy to lose so make sure you hold on to it.

AR15 Dust Cover Spring and Pin

Now you need to back out the dust cover pin. This is simple and can be done by hand or with a pillar. Before you do this, note how the spring is attached to the pin.

As you pull the pin out, keep your thumb over the spring so it doesn’t fly off.

Once the pin is out, place your new dust cover in place, making sure it is orientated correctly.

Feed the pin into the new dust cover just shy of coming through the open area where the spring goes.

Grab your ejection port spring and put it in position (photo). The short end of the spring should point towards the top of the rifle(photo).

Now, in order for the spring to work, you need to twist the long end of the spring towards the ejection port so it lays in the groove on the dust cover and is under tension. Once you have that spring in place, hold on to it with your hand and push the pin the rest of the way through.

The last step is to put the C clamp back in the groove on the dust cover pin. This is easier than removing it and can be done with a pair of tweezers(photo). Make sure to push it down until you hear an audible “click”.

Check out all of AT3’s Dust Covers here.

One Last Tip

If there’s anyone that knows the AR-15 platform, it’s the US military. As a special offer for our readers, you can get the Official US Army Manual for AR-15/M4/M16 right now – for free. Click here to snag a copy.

Category: AT3 Tactical AR Academy

Tags: ar-15, upgrades

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