How much of glass of the offset red dot should be visible?

[Jayjay1]

Hey guys,
I do have a 2-10 scope on my AR15 and want to add a red dot offset for near fast shots.
I got me an Arisaka mount 35°/45° for a Steiner MPS.

I want the red dot as close as possible to the scope, but when I mount it at 35° I can only see 2/3rd of the glas and just barely the dot.
When I mount it at 45° I can see the whole glas and even a gap between the scope and the red dot.

Having no experience with an offset red dot at all, I want to ask you which route you would go.
Is it ok to just see the dot, or is it a must to see the whole optic?

Any infos appreciated.

 

[Old Man with Gun]

Kind of depends on how you will use the RDS? Is this only for standing/moving/CQC? Will you be pulling the rifle up into position or locked into your shooting position?

To me, this comes down to the technique used. If you will have the RDS below line of sight and just pick the dot up onto the target to fire, as long as you can quickly do that, you can have both eyes open and don't need the window to be large.

If you want to lock the rifle into your upper body so the RDS pivots with you and is what you are looking at, you need all the window and around it you can get. For most right handed shooters with scope and right side offset, the scope blocks most of the left eye/side creating a lot of blind spots.

I recommend 45° in your case.

Personally, I prefer a LPVO or RDS on top of the scope.

 

[Jayjay1]

If you want to lock the rifle into your upper body so the RDS pivots with you and is what you are looking at, you need all the window and around it you can get. For most right handed shooters with scope and right side offset, the scope blocks most of the left eye/side creating a lot of blind spots.

I recommend 45° in your case.

Personally, I prefer a LPVO or RDS on top of the scope.

Like I wrote for fast close shots, further out I will use the scope.

I hear you with the 45° offset or on top positioning.
But I´ve read a lot about that back and forth and there is no right thingy for everyone, so I thought I have to start somewhere.
Probably I will test both.

Will do the 45° offset for now and look how it turns out for me.

 

[Gunfighter14e2]

If you are really serious about this, ditch the dot and install a guttersnipe or something of your own design. With a little practice you'll be good to minute of chest @ 100yds.The guttersnipes were used years ago mostly on pistols, but some found they were great for CQB on long guns as well.