I was thinking about getting a killflash for my aimpoint but wanted to know if anybody had any experience with them. get one yes or no and why. ???
I say no, let the mission drive the gear not the other way around… My mission is home defense so I have no use for it.
I have an Aimpoint CompM4 & CompM4s, both came with the killflash units but I don’t use them as their use results in a darker sight picture, they restrict the light that gets through the optic. I shoot with both eyes open so I could live with it if necessary, but I don’t like them.
Now if I was on patrol in the middle east and using a killflash had some definitive benefit I’d use it.
What does the killflash do? Make the optic easier to see in bright daylight?
No it hides the reflection on front of the red dot so you cant be seen.
I thought I’d get a lot of use from my killflash, until I thought about the completely uncovered Surefire on the end of my gun. I don’t know too much about the signature given off by unused lights, but it seems to me, that anything that will cause a visible glint off the AP will also glint off the light? 
+1 If you are not using the optic in a tactical situation ie: force on force then you dont need one. They fuzz up the sight picture and suck in general but do serve the purpose of keeping your optic from giving away your position.
I have killflash on both of my SHTF carbines, went through carbine class
with it and didn’t find it to be a hindrance as far as sight picture. I don’t
even notice the “honeycomb” anymore. I also have surefire filter/diffuser caps
(painted flat black ,O.D.,FDE) over my weapons lights to hide the reflectors in the
day. Just flip it down for night or if I have to run into a building in the day.
BTW, one can also use a piece of sheer stockings pulled tight in between the red dot sight
and the scope cover to eliminate the red dot signature or any scope signature.
IMHO, the killflash darkens the view through the optics too much for my liking. I use on on my Sniper rifle where magnification makes the honeycomb indiscernible. But not so in a unmagnified optic.
I have a used killflash for the M2/M3 line of Aimpoint scopes if you’d like. I willing to trade it for something I need (I’m currently looking for a handguard rail QD mount). Pm me if interested.
I do have some UTG handgaurd covers if interested there new.
This is not the Member Sales Forum.
The killflash helps prevent any reflection of your optic so that you don’t give away your position. The killflash is fine during the day but at night it bothered me. so I just took it off.
I use the killflash at home because I will use it when I deploy, no sense in shooting at home with a different sight picture than what I will be using for work.
This is a recent thread that contains a solution for split-second on and off killflash mount https://www.m4carbine.net/showthread.php?t=34743.
I find killflash very helpful in picking out the dot in a bright day, especially against bright backgrounds.
I was issued one with my ACOG. Removed it in theatre. It was nearly impossible to identify figures during low-light conditions yet alone what they had in their hands or their expressions.
When I had one with my Aimpoint M4 stateside I didn’t have any problems. As stated in the thread cited by YVK, people complained about it while clearing rooms but if they kept both eyes open it wouldn’t have been a problem.
Well said… 
I’ve personally never had a use for the killflash on a carbine in a military setting. If being compromised by reflection is a concern, use an opaque cover such as a Butler Creek and the bindon aiming concept. There are other things you can do to prevent being compromised by flash, such as hide site and route selection that are a lot more important than a honeycomb.
If anything, I’ve seen the killflash honeycombs bend or fill with mud putting dark blotches in the field of view.
Does anyone on here have a situation where they found the killflash an essential piece of kit? I’d like to hear your experiences, maybe there’s something I’m not thinking about.
I agree with this (highlighted in red).
They come loose with the recoil, in the end it’s just another waste of riggers tape.
During low light situations, they prevent the optic from gathering 100% of available light.