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One Hundred Concepts



Regular price $150.00 USD
Regular price Sale price $150.00 USD
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  • 3-Position ApertureSlider for rapid focusing and ultimate protection
  • Blackout position for daytime outdoor protection and black-boxing*
  • Sacrificial lens for force-on-force training*
  • ShockCollar  included for ApertureCap and retention lanyards
  • Patent Pending

Night vision users are all too familiar with the benefits of a refocusing device, with the "DIY Refocus Cap" often being the first mod any new NVG owner does. By constricting the aperture of the NVG, your depth of field becomes much deeper, and more of what occupies your field of view becomes in focus. This is extremely helpful in situations where doing any type of administrative work, like map reading or manipulating objects. It's also useful in situations where engagement distances change rapidly, like CQB inside structures.

Unlike other refocus devices on the market, ApertureCap™ does not require fine adjustment to adjust the focusing. It also has cutouts along the FoF Cap that allow for easy adjustment of focus distance on the NVG itself while remaining in the desired orientation thanks to the unique mounting solution.

If you enter an area that is too dim, simply reach up and flip the tab on the ApertureCap™ to move the constricted aperture out of the way. Finally, a 'blackout" position on the aperture slider with a textured confirmation has been added so that you can utilize your NVGs during the day or in lit structures and confirm by touch that your NVGs are completely blacked out.

The included ShockCollar™ and shock cord allows you to firmly secure the ApertureCap™ to any Carson or RPO style rear optics, and the PVS31a variant and GPNVG variants come with ShockCollars specifically designed for those units. This ShockCollar™ also includes a 3rd tab for easy looping of retention lanyards.

*One Hundred Concepts makes no promissory of warranty for any damage to night vision devices when using ApertureCap™. The burden is on you to know the conditions of your equipment and to prevent damage to it.


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The 37mm was designed for the ubiquitous PVS-14 lenses and thus fits the majority of night vision devices on the market.

Confirmed 37mm Fits:

  • PVS-7
  • PVS-14
  • RNVG
  • RNVG
  • RNVG-A
  • PVS-31D

Confirmed 35mm Fits:

  • AN/PVS-31A
  • BNVD

Note: Known fits are with stock lenses . Cannot confirm fitment with aftermarket replacement lenses.


1x Mounting Body.

1x Polycarbonate sacrificial lens with optical grade anti-smudge anti-scratch coatings.

1x Low-profile cap with 3-Position ApertureSlider™

1x ShockCollar with additional routing loops to give you secure retention options.

1x Shock cord retention lanyard with cord lock.


The ApertureCap is designed, manufactured, and assembled in the USA from American sourced materials.

Based on 388 reviews



Great product. Definitely shopping for more soon.

Patrick Cote
aint nothing better anywhere

great product . well made and does a better job than anything else.
super simple and it kinda pisses me off i didnt think of it myself. Kuddo to the onehundredconcepts team !

You need this!

Really cleans up the look. It's Also easier to change light batteries!

Thomas Pfeiffer

Great product! Changing batteries is a lot easier now!

Tom Scott
So simple

Yet so amazing. Got a small for my Surefire M640DF and a Medium for my Surefire M340DF Turbo. They fit perfectly.

ScopeCap Pro™
Jesse Terrazas
Scope cap pro

Mounted it to my Leupold Mk6 1-6. Very happy with it!

Perfect solution

This is the perfect simple solution for an annoying problem.

Cody S
Lightcap fits great and works awesome!

Great product, fast shipping. Will be ordering more gear from One Hundred Concepts!

Works as intended

Does exactly what’s it’s supposed to do. Only have a couple hundred rounds with it on the rifle. I will be putting these on all my builds in the future.

Zach Boswell
The Best!

Got the Shock Collar and Light Cover for the Rein 2.0 and absolutely love it! They released the Coyote Tan version a day or two after I ordered the OG version, and I would have rather gotten that, but nonetheless the OG light cover is snappy and secures tightly!

Gian Agar
Awesome Stuff

Simple and effective piece of equipment. Highly recommended.

Simple yet very useful design

ScopeCap is simple and it works. Protects the glass and easy to remove. Won't fall off and get lost in a pinch. If you have an LPVO, pairing the cap at the eyepiece end with a ShockCollar is a must. Going from 1x to 6x, for instance, will re-orient the ScopeCap if you're using the Range band. ScopeCap moves with the eyepiece when you zoom in and out if you use the ShockCollar.

Light Cap?

So I purchased this at a discount while purchasing the scope caps I needed.

That said, I put this on a rifle where I was using a Half-bikini scope cover for a 32mm rifle scope bell to cover the reflector on my rifle light. The Half-Bikini cap cover did the same job, cost a dollar in a second hand bin. It didn't look good, but it worked well enough. It weighs about as much as the Light Cap. Also in a light ND situation, the Half-Bikini did better at arresting the light, the Light Cap spilled a significant amount of light back at me.

The parts I'm impressed with are how it snaps back into place and how good it looks on my rifle. I'm REALLY impressed with how much better it looks over the Half-Bikini cover that I was using to cover my rifle light. The Install was pretty easy too.

I'm keeping it on my rifle, but I'm not going to get many more. YMMV.

Love It

Love the RMR kill flash by One Hundred Concepts! It locks onto the RMR much more securely than the kill flash by Trijicon. I would have problems with the Trijicon cover popping off of my ACOG ECOS when slinging it across my chest with a plate carrier. Now that problem is history!


Got these for my nx8 sizing guide was accurate and instructions were easy to follow. Looks great and functions as described

Well worth the money

I had another company's scrim before hand, I won't name them beause I don't believe in shaming small businesses, but it left something to be desired of. My setup is mainly MC tropic so I figured I'd try the OHC instead to see if it was any better, it is. Fits much better and isn't extremely tight, nice laser cut cordura instead of flimsy material that will break as soon as it snags, and looks cool, which as we know is the most important part.

Exactly what I needed

I like this design a lot more than traditional caps. I abuse mine pretty good and these hold up nicely.

William Marcom
Light caps

Ordered two light covers for my arisaka lights with malkoff heads. Small size fit perfect on my E2HT head. Medium size was a little bigger than the E2XTL head on the other. Both work fine and are a simple yet elegant solution to keeping carbon off the lenses and prevent ND'ing my white light under NODS. Having 2 pressure switches sucks but this fixes that issue well enough for me.

Gregory Webb
Light cap

Works great.

Bert Jocks
Light Cap & Shock Ring

Bought the light cap with the ranger band retainer for my Streamlight Protac weapon light.
Worked as advertised & I was pleased but wanted to try the Shock Ring with the Light Cap setup on my Rein 3. Works perfect. Had to play with where to situate the tensioning screw because my light sits very close to my BUIS but made it work. I’ll order again.

Absolutely love it!

Upon receiving it, the install was quick easy it’s straight to the point. I ended up installing it on my colt upper 11.5, and I paired it with my Surefire Scout light. Fellas if you’re in the market for a Lightcap, this is it. Protect your investment from carbon buildup.

Logan J
Quality Product

Bought one for my Modlite plh and loved it so much i turned around and bought another for my okw. Easy to install, easy to actuate & serves multiple purposes. Worth every penny, thanks again!

Light Cap

Great product. Great customer service. Arrived in less than a week.

Justin Smith
Great product and better service

Awesome sturdy product and even better customer service.