Red Dot question [Archive] - Glock Talk

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detroit9mm
12-24-2012, 22:49
I just got my first AR and I have a question regarding the use of a red dot. It is currently set up with the regular front sight and a magpul flip up rear. I am considering going with a Bushnell TRS25 red dot sight. Gun is just for fun so don't want to spend a bundle on a high end optic. My question is will I need a riser to use the red dot? I would like to be ale to use the irons thru the optic if needed. Thanks!

Glock21Owner
12-24-2012, 22:58
You will only need a riser if you want the sights to match up with, or "co-witness" the red dot. The co-witnessed red dot will give you a reference as to how your sights are aligned.

detroit9mm
12-24-2012, 23:06
I'm not concerned that they co-witness. My only thought was that without riser the dot may be below the top of the front sight and the post would obscure the target since the front isn't a flip up. Maybe that isn't the case at all and that's why I decided to ask the question.

mvician
12-24-2012, 23:19
Yes you will need a riser. Otherwise the dot is going to be way down the back of the front sight base.

You will need a riser like this

http://www.midwayusa.com/product/992371/leapers-utg-high-profile-3-slot-compact-picatinny-style-riser-mount-ar-15-flattop-matte

majette
12-24-2012, 23:20
yes, you will need a riser. oops, mvician beat me to it.

detroit9mm
12-24-2012, 23:40
Ok, is the 1" riser the best choice for whatim looking for? I'd still like to be able to use the irons thru the optics if needed.

mvician
12-25-2012, 00:03
Yes, it is the same riser that Primary Arms sells with their fixed base micro dot.
It will give you lower 1/3 cowitness.

http://i48.photobucket.com/albums/f240/mvician/cowit1-1.jpg

detroit9mm
12-25-2012, 00:07
Thank you sir, the exact info I was looking for!

pnutcar
12-25-2012, 01:56
Great thread! I'm in same boat as OP and picked this up at Cabelas for $30 and haven't been able to get out to shoot since.

http://www.cabelas.com/product/Center-Point8482-Tactical-Open-Reflex-Sight/1412024.uts?Ntk=AllProducts&searchPath=%2Fcatalog%2Fsearch.cmd%3Fform_state%3DsearchForm%26N%3D0%26fsch%3Dtrue%26Ntk%3DAllProduc ts%26Ntt%3Dreflex%2Bsight%26x%3D0%26y%3D0%26WTz_l%3DHeader%253BSearch-All%2BProducts&Ntt=reflex+sight&WTz_l=Header%3BSearch-All+Products