Description
The One Hundred Concepts Ruggedized Rear ScopeCap is one of those pieces of kit that solves a problem you didn't realize was nagging you. Flimsy factory flip caps crack, pop off, and stick up in your sight picture. This one is cut from tough, UV-resistant thermoplastic and rides low against your optic, so it shrugs off scratches, grit, and glare off the ocular glass without adding bulk behind your scope. Size 3 is built for the larger eyepieces, fitting a rear lens housing measurement up to 46.5mm, or 1.83 inches.
What Sets the Ruggedized Rear ScopeCap Apart
The heart of the design is the integral flipper tab. Give it a flick and the cap clears your bezel instantly, laying flat and out of the way instead of flopping around like a hinged cap. It mounts using a shock cord and ranger band system rather than a bulky clamp, which keeps the whole setup slim and lets you tune the tension so there's no rattle when you're on the move. The cord keeps the cap tethered to your optic, so you can pull it aside for a quick shot and snap it back on when you want to shield the glass again.
Fitting the Size 3 Rear ScopeCap to Your Optic
Sizing comes down to one measurement. Grab calipers and measure the outside diameter of your scope's ocular housing edge to edge, not just the lens itself, and pick the cap that's equal to or larger than that number. Size 3 covers eyepieces up to 46.5mm and is the right call for optics like the EOTECH VUDU 1-10, SIG TANGO6T, Nightforce ATACR 1-8, Vortex Razor HD Gen II 1-6 and Gen III 1-10, and the Trijicon VCOG 1-8. If you land between sizes, round up for the cleaner fit.
Keep in mind this is a single rear (ocular) cap, not a front-and-rear set. It's made in the USA and backed by One Hundred Concepts' lifetime warranty, which covers repair or replacement if the gear fails under normal use. For hunters, precision rifle folks, and anyone who runs an LPVO hard, it's a simple upgrade that earns its keep the first time your scope takes a knock.
Key Specifications
- Manufacturer: One Hundred Concepts
- Model: Ruggedized Rear ScopeCap
- Manufacturer Part Number: OHC-RSC-3
- UPC: 3511144152199
- Size: 3 (Large)
- Fit: Ocular lens housing up to 46.5mm (1.83 in)
- Lens Position: Rear / Ocular
- Material: UV-resistant thermoplastic (TPU)
- Color: Black
- Finish: Matte
- Mounting: Shock cord and ranger band
- Product Type: Scope Cover
- Country of Origin: Made in USA
- Warranty: Lifetime
What’s Included
- One OHC Ruggedized Rear ScopeCap (Size 3)
- One ranger band
- Two 14-inch lengths of shock cord (Black and Coyote)
Frequently Asked Questions
How do I know if Size 3 is the right Rear ScopeCap for my scope?
Measure the outside diameter of your scope's ocular (rear) housing edge to edge with calipers, not just the glass. Size 3 fits housings up to 46.5mm, or 1.83 inches. If you measure between two sizes, round up to the larger cap for a clean fit.
Does the Ruggedized Rear ScopeCap come as a pair with a front cap?
No, this is a single cap for the rear (ocular) lens only, the one closest to your eye. If you want to cover the objective lens up front, that's a separate front cap sold on its own. Many folks run both for full coverage.
What optics does the Size 3 Rear ScopeCap fit?
Size 3 is a match for larger eyepieces found on optics like the EOTECH VUDU 1-10, SIG TANGO6T, Nightforce ATACR 1-8, Vortex Razor HD Gen II 1-6, Vortex Razor HD Gen III 1-10, and the Trijicon VCOG 1-8. When in doubt, always confirm with your own measurement since eyepiece diameters can vary.
Will the cap rattle when I'm moving around?
Not if it's tensioned right. Position the ranger band far enough back so the cap fully clears the bezel when flipped aside, then pull the slack out of the shock cord behind the band. Done correctly, it stays quiet and snug through movement.





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