TR25 riser question

[jofprexus]

Hey all,

I picked up a Bushnell TR25 red dot for my Smith & Wesson M&P 15 tactical. Does anyone know how high of a riser I need to get it to cowitness with the Magpul flip-up sights?


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[0351USMC]

http://www.amazon.com/UTG-Medium-Profile-Riser-Mount/dp/B003TX2BD4/ref=sr_1_1?ie=UTF8&qid=1381018190&sr=8-1&keywords=utg+riser

[Munny$hot]

A UTG 1" will give you absolute and a .83 will be 1/3 co-whitness. Be sure to buy a 3 slot rail so your RDS will mount in the middle of the rail.

[BluNorthern]

Been looking into putting a trs25 on my M&P Sport. First AR and am green as far as co witnessing, risers etc. Thanks for the information. I'm assuming the UTG riser that 0351USMC posted will work with the standard fixed Sport front sight?

[paintballdad]

A UTG 1" will give you absolute and a .83 will be 1/3 co-whitness. Be sure to buy a 3 slot rail so your RDS will mount in the middle of the rail.

I believe you have it the other way around. The UTG high profile 1" riser will give you lower 1/3 cowitness and the medium profile .83" will give you absolute cowitness.

[jofprexus]

Thanks for the replies everyone - Just ordered the .83!

[OpticsPlanet]

Been looking into putting a trs25 on my M&P Sport. First AR and am green as far as co witnessing, risers etc. Thanks for the information. I'm assuming the UTG riser that 0351USMC posted will work with the standard fixed Sport front sight?

BluNorthern,

If you don't already own a TRS-25, Bushnell makes a model with the riser included - it provides an absolute cowitness:

http://www.opticsplanet.com/bushnell-ar-optics-1x25mm-trs-25-hirise-3-moa-red-dot-sight.html

Mark H.

[jofprexus]

Just following up, the .83 arrived today and aligns perfectly!

Thanks again, guys

[ZER0_]

Just following up, the .83 arrived today and aligns perfectly!

Thanks again, guys

So, the .83" riser gave you full cowitness?

[jofprexus]

So, the .83" riser gave you full cowitness?

Yep, I made a slight adjustment to windage, but in elevation the dot sits perfectly on the tip of the front sight.

Time to take this thing to the range

[ZER0_]

Yep, I made a slight adjustment to windage, but in elevation the dot sits perfectly on the tip of the front sight.

Time to take this thing to the range

Cool, thanks.

[Munny$hot]

I believe you have it the other way around. The UTG high profile 1" riser will give you lower 1/3 cowitness and the medium profile .83" will give you absolute cowitness.

Yup realized it a day after I posted this. IIRC 1/2" is absolute and .83 is 1/3

[BluNorthern]

Got my TRS-25 and my UTG .83 riser yesterday. Mounted it this morning and it's perfect...dot sits right on top of the front sight of my M&P Sport, which is what I wanted.

Thanks all for steering me in the right direction.