AIM-O Killflash ADR - Honeycomb Anti-Reflection Device

Two separate problems get solved by one honeycomb disc. The first is glint: a curved glass objective catches low sun and throws a bright wink across a treeline, and the far end of that treeline is somebody looking for exactly that. The honeycomb grid breaks the reflection up so there is nothing to see.

The second is the one that costs money. An objective lens is the softest, most exposed part of any optic, and a direct hit at ten metres chips or cracks it. A metal grid in front takes that hit instead and is a fiver to replace. It is the single highest-return accessory on a scoped gun.

Choose the fitment to match the optic you already own. T1 and T2 covers the micro red dots built on a 25 mm objective. The Eotech-pattern version suits the square-window holographic sights. MRO and RMR cover the round-window reflex and the small pistol-pattern optic respectively. Each is machined for its own bezel, so it clips on without a mount or an adaptor.

Specifications

Good to know before you buy

Match the fitment to your optic rather than to the brand name on it. Plenty of clone optics copy the T1, MRO or RMR bezel dimensions exactly, which is why one grid covers a lot of different sights.

A honeycomb grid costs you a little light and a slight sense of looking through a screen. On a red dot that is barely noticeable; on a magnified scope in poor light it is more obvious.

Treat it as a consumable. If it takes a hard hit and deforms, bin it rather than straightening it — a bent grid sits proud of the bezel and lets the next BB past.

Frequently asked questions

Will this fit my optic if it is not an AIM-O?
Very likely, if your optic copies one of those four bezel patterns, and most clone micros and reflex sights do. Measure the objective bezel and compare it before ordering if you are unsure.

Does it dim the sight picture?
Slightly, because the grid walls block a small share of the light. The dot itself is unaffected, so on a red dot you will struggle to notice.

Can I leave it on permanently?
Yes, and most people do. It uses no rail space and adds a few grams.

What is the difference between ARD and killflash?
Nothing. ARD stands for anti-reflection device, which is the formal name for the same honeycomb grid that everybody on a game site calls a killflash.

Which one do I need for a holographic sight?
The Eotech-pattern fitment. It is cut for the wide rectangular window rather than a round bezel, so a round grid will not sit on it.