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Discussion Starter #1
I'm new to scopes/red dots, so bare with me. I bought this mp5 rail mount, it says airsoft only but hopefully 22LR is fine. So then I went with the Bushnell Trophy TRS25... it seems to be popular and affordable red dot scope. Anyways, my problem is this... I think either the rail mount is isn't "low" enough or the scope is not low enough, because I can't see through the rear sight and be able to see through the scope too. I have to adjust the red dot really low which makes the inner lens part inside the scope move way high (and looks weird) to be able to see the red dot aligned with the front sight. I feel like I'm missing something here. I shouldn't have to adjust the height of the red dot so much I wouldn't think. My only guess is the rail mount is too high to be able to have true co-witness... but even then, if I don't use the rear sight how can I get it to work with just the scope and front sight? I would of preferred true co-witness but I'd probably have to get another rail mount that is lower. Thanks for the help!

 

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I think it was suggested in the other thread to buy the Classic Army rail. I have the CA rail + Primary Arms Micro Dot and it co-witnesses perfectly with the iron sights.
When you zero the sight, you line up the rear with the front sight, through the red dot. If the tip of the front sight hits where you aim it, then I would adjust the height of the red dot to float right at the tip of the front sight.
 

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i don't think red dots on mp5 work that way. Correct me if i'm wrong but you have to adjust the red dot to be on target and just place the dot on a target and shoot. you don't have to line up the red dot with the iron sights. I had a mp5sd 22 cal and the mp5 40cal with 2 different red dots and both work the same way.
 

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im on the side with skittle, my gsg mp5 clone worked in the way that you zeroed your red dot on target, NOT in line with the sights, i had mine zeroed at 75 yards and it was considerably higher than the iron sights, hope that may help ya :)
 

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Discussion Starter #5
TooSixy: I am sorry that I didn't just do what you suggested but the only reason I didn't get the CA rail is because you said it was longer, and I was bothered by that for some reason. I thought this one I bought on ebay would be low enough for true co-witness. By looking at the photos above, can you tell that it's higher than the CA rail?

I'll be honest, I'm still confused... I need to re-read what you guys wrote and try to grasp it.:confused:
 

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that red dot you got is a good one. just figure out what distance you was to set it for, then go through the steps of sighting it in. easiest way is to place the rifle on a mount or sand bag and without moving the rifl place a couple rounds on the target, then set the sight's red dot on the spot your hitting or in the grouping. hen you'll be ready to go. 25yards seems like a good set point. just place the dot under or over the target for different distances greater or less then 25 yards from there.
 

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skittle is right, aim with your dot, at the center of the bulls eye, record how far off your bullet landed, and adjust left-right, up-down, accordingly...there should be a flat head screw adjustment for up down, left right, i also own one of those red dots, and dig it for the application its for..
 

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Discussion Starter #8
so i went ahead and bought the classic army rail to see it it was lower, and it was identical to which i already bought on ebay.... i am good at wasting money!
it must be this red dot scope, you can't do true co-witness.
 

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OP: you can achieve a true co witness with your iron sights if you can find a B&T low profile mount. I have it on my CA89-SD with Aimpoint Red Dot. FYI: DS Arms has them on back order.
 

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Just put a TR25 on my .22 MP5 SD using the Classic Army A363M low mount and ended up adding a 1/2 spacer between the rail and sight. While it technically cowitnessed, the sight picture was just too cluttered looking through the iron sights. Also, the TR25 has a little box in the lower right corner of the rear window that projects the red dot, and that clutters the view up even more.
 

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Co-witnessing is way over rated. Call me old fashoned, but I use either one or the other. I can't stand both sets of sights at the same time. The guns that co-witness every time are the AR series... ANY gun with a Picatinney rail can be considered an AR type gun for sighting purposes. I have an Eotech combined with the YHM BUIS setup and although I didn't plan it, they co-witness perfectly... same with a C-more railway and another set of YHM BUIS on another gun. Perfect alignment without trying. That said, the YHM's stay locked down out of the way and I use the optics exclusively. Both setups are on M-11 competition guns, BTW.

If for some reason the optics go out, then I can pop the YHMs up and since the red dots will be gone, it won't bother me. I'd rather have a tilt away mount under the optics so IF I needed to go to the BUIS, I could just knock the optic to the side and proceed.

But as far as going out of my way to make them co-witness? No frakking way.
 
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