AR-15 Ejection Port Cover Assembly
In stock
- SKU
- AREPCA
Description
Features
- Complete Drop-In Assembly — Includes the ejection port cover door, hinge pin, C-clip, and spring — everything needed for installation on a standard AR-15 upper receiver.
- Mil-Spec Dimensions — Manufactured to MIL-SPEC tolerances for direct fit on AR-15, M4, and M16 platform upper receivers without modification.
- Aluminum Cover Door — Lightweight aluminum construction with a black anodized finish that matches standard AR-15 upper receiver coatings.
- Spring-Loaded Snap Action — Pre-tensioned spring snaps the cover fully open on the first round fired and stays clear of the ejection path.
- Debris Protection — Keeps dirt, sand, dust, and moisture out of the bolt carrier group and chamber when the rifle is not in use.
- Builder-Friendly Kit — Ideal for new AR-15 builds, parts replacement on worn rifles, or stocking the spare-parts bin for future projects.
- U.S. Made — Produced in the United States to meet the quality standards expected of a duty-grade rifle component.
- Universal AR-15 Compatibility — Fits any standard forged or billet AR-15 upper receiver with the standard ejection port cutout and hinge channel.
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Customer Reviews
Top customer reviews
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Cheap insurance for your ejection portI had a sluggish dust cover on my old M4gery and it was driving me nuts. The original spring was wierdly bent and just didnt have the snap anymore. Ordered this United Defense one on a whim cause its like 5 bucks. Came in a little baggie, no instructions but honestly its a spring, you dont need a manual. Popped it in (took 30 seconds) and now the cover flies open like it should. Ive put about 500 rounds through since and its still perfect tension. The phosphate finish is a bit uneven but who cares its hidden inside the receiver. Def should of just bought this first instead of messing with the old one. Anyway, I ordered another for my spare parts kit. If you build uppers or just want a backup, grab a couple.
Perfect tension Drop-in fit Super cheap
No instructions (but not really needed)
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5 minute install, makes the build feel completeBuilding an upper from a stripped receiver means you need all the little parts that people take for granted on a factory gun. This ejection port cover assembly was one of the last pieces I needed and it went together in about 5 minutes with a youtube video and a punch. The door snaps open and closed with a solid positive action none of that floppy loose feeling you get from the cheap no-name dust covers. The fit on my Aero upper was dead on with no slop or misalignment. Its one of those parts that dosent seem important until you take your rifle to the range without one and come home with a bolt full of sand and grit. For a few bucks this is a no brainer, just toss it in the cart with whatever else your ordering
Complete assembly with all parts needed for installation, nothing else to buy
Mil-spec dimensions fit any standard AR-15 upper receiverNo instructions included, your gonna need youtube
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Complete Kit With Everything You Need IncludedI was finishing up a stripped upper build and needed a dust cover assembly. Ordered this kit and it came with every single part including the rod spring clip and pin which saved me from having to source anything separately. Installation took about five minutes following a youtube video and the door snaps open and closed with a solid positive action. The fit on my Aero upper was perfect with no slop or misalignment. For a small and inexpensive part this is one of those things that makes your build feel complete and properly finished. If you are building an upper from a stripped receiver just grab this and check the dust cover off your list.
Truly complete kit with every part included so there is nothing else to buy
Installs quickly and snaps open and shut with crisp positive actionNo written instructions included so first time builders will need to reference a video