Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Guntec USA AR-10 / LR-308 Gen 3 Ejection Port Dust Cover Assembly
As Low As $19.99 Save Up to 44%
View Product
Compare (0)
Most Helpful Positive Review open the door the bulletts are comming out
very nice it matches with my 308 build nice color tight fit looks like it was made for the rifle the ejection spring was tight the rod was very nice no scratches works just rite closes shut no gaps no worie for dust
Show
Sort by
Filter by

Looks nice, machined wrong

by Themuphinman, Verified Owner from PA, United States Written on December 30, 2025
Loop for the bar to go through is flat on the top side that it meets the dust cover, so it hits the receiver lip, creating tension and not allowing it to close.
It was really a waste of money and should be refunded, but got it to work decently by sanding the top of the hoop where they meet the plate. After 30 minutes or so sanding carefully, and loosing color on the side sanded, it could now close as it should and works as it should have to begin with and without having the color break just to make it work.
As was it was not worth more than $3 bucks, if you got a correctly machined one somehow, then surely worth what it's sold for.
Will see how i can get a claim or something given this.
Pros:
  • looks nice in the green i got
Cons:
  • Doesnt fit
  • not machined correctly
  • doesnt match other guntec usa parts of same color code...
Best Used for:
  • .308/ar-10
Would recommend: No
Was it helpful to you? Yes | No

Good look!

by Jason, Verified Owner from NE, United States Written on December 11, 2025
Easy to install and gives a custom look with minimal effort.
Pros:
  • Ease of insallation
Cons:
  • None
Best Used for:
  • recreation and home defense
Would recommend: Yes
Was it helpful to you? Yes | No

quality built

by Donald McDowell, from WI, United States Written on June 19, 2025
Great quality highly recommend. If you have multiple uppers it’s a must!
Would recommend: Yes
Was it helpful to you? Yes | No

Works great as intended. Basically for free.

by Luke Scudder, Verified Owner from MO, United States Written on January 14, 2022
Got it with my aero upper basically for free. It was super easy to install. Easier than I thought. And it can be easily customizable with cerakote, paint, or what ever you want. Fits perfect on the aero m5 upper. And I believe it will be the same on any other ar10 profile upper.
Pros:
  • GREAT PRICE
  • Easy to work with
Cons:
  • None
Best Used for:
  • AR10 platforms
Would recommend: Yes
Was it helpful to you? Yes | No

was a little lacking

by Jeremiah Davis, Verified Owner from TX, United States Written on March 11, 2021
Yhe end plate is on so tight that it has tonhe pried with a flat head once installed. Otherwise itsthe best priced kit in the site. It works for now... there is no cut out for the buffer retqiner pin but that is not a deal breaker. Other than those complaints it looks really good mounted to the receiver.
Would recommend: Yes
0 of 1 found the following review helpful.
Was it helpful to you? Yes | No

AR-10/LR-308 Ejection Port Dust Cover Assembly

by Craig, Verified Owner from TX, United States Written on June 13, 2018
The AR-10/LR-308 Ejection Port Dust Cover Assembly was just as advertised. it installed without a problem and it works on the DPMS LR 308 Upper receiver without a problem. And it looks great, the only issue is that it didn't come with a clip.
Pros:
  • Easy to install
Cons:
  • no C Clip
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Guntec dust cover

by Pete, Verified Owner from MO, United States Written on March 14, 2018
This fits well into an Aero M5. Easy to install, letters on both sides, so you see it when it's open and closed. Only reason no 5 star is that the spring was a little weak but works non the less.....
Pros:
  • Perfect fit for Aero M5
Cons:
  • Weak spring
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No
There are no reviews that match your criteria. Would you like to review this product?