The Strike Industries Ultimate Dust Cover in Flat Dark Earth (SI-AR-UDC-E-308-01-FDE) is a high-density polymer replacement for the standard AR-10 .308 ejection port cover. Built tougher than a stamped steel factory cover, the SI UDC resists corrosion, deformation, and fading. The spring-loaded internal detent rod lets you attach or remove the cover in 5 to 10 seconds — no tools required.
Strike Industries UDC .308 FDE — Features & Design
The SI UDC .308 uses a high-density polymer construction that will not corrode, rust, bend, or deform over time. Key design features include:
- Spring-loaded internal detent rod — attaches and detaches in 5 to 10 seconds for fast field stripping
- Adjustable tension set screw — compensates for receiver wear and lets you dial in opening resistance over time
- High-density polymer build — lighter than steel, resistant to corrosion and deformation
- Flat Dark Earth (FDE) finish — will not corrode, rust, or fade
What’s Included — Strike Industries AR-10 .308 Dust Cover FDE
The package includes all three components needed for installation:
- 1x Ultimate Dust Cover (polymer, Flat Dark Earth)
- 1x Spring
- 1x Pin
Note: The dust cover, spring, and pin ship as separate components and require installation on the upper receiver. The dust cover assembly is not pre-installed.
Strike Industries SI-AR-UDC-E-308-01-FDE Specifications
| Manufacturer | Strike Industries |
| Model | Ultimate Dust Cover (UDC) |
| SKU | SI-AR-UDC-E-308-01-FDE |
| UPC | 700598350630 |
| Color | Flat Dark Earth (FDE) |
| Material | High-density polymer |
| Compatibility | AR-10 / .308 upper receivers |
| Includes | Dust cover, spring, pin |
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