Description
The ejection port cover is one of those AR-15 parts nobody thinks about until they fumble with a cheap one in the cold or in a hurry. Forward Controls Design took that overlooked piece and rethought it from the ground up. Their EPC is built to TDP dimensions so it drops in like a factory part, but the details are where it earns its keep. It's machined from billet 7075 aluminum and finished with a hard coat Type III anodize in OD Green, so it holds up to wear and corrosion the same way the rest of a serious build should.
What Sets the EPC Twin Dimple Apart
Two small tabs flank the cutout for the port cover spring. Those tabs let the cover rest on the upper at a steeper angle when it's open, which opens up more room between the cover and the lower receiver. That extra space matters because it gives your finger somewhere to get under the cover to swing it closed, instead of pinching at a flat piece flush against the receiver. It's a small change that you feel every single time you close the port.
Twin Dimple Tactile Feedback
The twin dimple version adds shallow circular depressions to the surface of the cover. A flat face gives your finger nothing to grab or reference, so these dimples add both traction and tactile feedback. You can feel the port open and close without looking, which is the whole point of a well thought out control. It weighs in at right around 0.30 ounces, so you're getting the upgrade without any meaningful weight penalty.
Real-World Fit Notes for the FCD EPC
This cover is built to TDP spec and works with a wide range of standard upper receivers. Keep in mind the area below the port varies in thickness from upper to upper, so the open angle can differ slightly depending on your receiver. The first few open and close cycles may feel a touch stiff, which is normal and loosens up after a couple of passes. Designed and made in the USA, it's the kind of small detail part that quietly makes a rifle nicer to run.
Key Specifications
- Manufacturer: Forward Controls Design
- Manufacturer Part Number: EPC 2D ODG
- UPC: 686162347988
- Color: OD Green (ODG)
- Style: Twin Dimple
- Material: Billet 7075 Aluminum
- Finish: Hard Coat Type III Anodized
- Weight: 0.30 oz
- Spec: Built to TDP Dimensions
- Platform: AR-15 / Standard Mil-Spec Uppers
- Origin: Made in USA
What’s Included
- Forward Controls Design EPC ejection port cover (ODG, Twin Dimple)
- TDP spec port cover rod
- C-clip
- Port cover spring
Frequently Asked Questions
Will the Forward Controls Design EPC fit my AR-15 upper?
It's built to TDP dimensions and works with the wide range of standard mil-spec upper receivers most builds use. That said, the thickness below the port varies from upper to upper, which can slightly change the open angle. A handful of proprietary uppers aren't compatible, so it's worth confirming your specific receiver if you're running something non-standard.
Does this EPC come with the spring and rod, or just the cover?
You get the complete package. It ships with the ejection port cover along with a TDP spec rod, C-clip, and spring, so you have everything needed to install it. No need to reuse hardware from an old cover unless you want to.
Why does the twin dimple version feel stiff when I first install it?
That initial stiffness is normal and nothing to worry about. The cover typically loosens up after two or three open and close cycles as everything seats in. After that it operates smoothly with the positive, tactile snap the design is known for.
What's the point of the twin dimples on the cover?
The shallow circular depressions give your finger traction and tactile feedback that a flat cover can't. You can feel the port open and close without having to look down at it. Paired with the standoff tabs that create more room beneath the cover, it makes running the port faster and more intuitive.





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