Scope/Riser Question

[Rocksprings]

Looking at the Bushnell TRS 25 3 MOA Red Dot 1X25mm & a UTG Medium Profile Riser mount for my M&P 15-22.
New-be question: What does MOA mean, and is the riser used so you can use the fixed iron sights or just to raise the scope for the shooters own comfort ?

 

[Mushki]

MOA stands for minute of angle. That's somewhat complicated but to simplify it the dot of a 3 MOA red dot sight will cover roughly a 3inch circle at 100 yards. I use the same red dot on my bullseye pistol and am quite happy with it. Sorry but I do not know what height riser you would need.

 

[97catintenn]

If the riser allows you to look through it and use your iron sights, that would be co-witness. For everything that I do, the riser is just to get the scope high enough for me to comfortably rest my cheek on the stock while I shoot. Without one, I'm really leaning over on it and the stock is uncomfortable and digging into my face.

Ever heard of cheek weld?

 

[MostlyHarmless]

New-be question: What does MOA mean?

Best way to answer that is to go to your nearest Appleseed shoot.

 

[Rocksprings]

If the riser allows you to look through it and use your iron sights, that would be co-witness. For everything that I do, the riser is just to get the scope high enough for me to comfortably rest my cheek on the stock while I shoot. Without one, I'm really leaning over on it and the stock is uncomfortable and digging into my face.

Ever heard of cheek weld?

Never heard of cheek weld and it doesn't sound like something I want. Thanks for the good answer.

 

[timeighty5]

Looking at the Bushnell TRS 25 3 MOA Red Dot 1X25mm & a UTG Medium Profile Riser mount for my M&P 15-22.
New-be question: What does MOA mean, and is the riser used so you can use the fixed iron sights or just to raise the scope for the shooters own comfort ?

TRS 25 and a UTG medium riser is the way to go.

 

[GhostMutt]

Risers are used to raise the scope so that the objective bell (which is generally larger than the eyepiece bell) clears the rifle. Or to raise the scope so that you can more comfortably get a sight picture without craning your neck to the rifle, thereby messing with your posture and your accuracy and consistency. Re: Cheek weld, it is the position of your cheek on the stock whilst you are acquiring a sight picture....these two should be consistent each time you bring the rifle to your eye, which will go a long way to making you more accurate, more consistently. As is my understanding.

 

[Decipher]

Never heard of cheek weld and it doesn't sound like something I want. Thanks for the good answer.

You DO want a good, consistent cheek weld. You're new so take some time to search YouTube on proper AR positioning and shooting techniques. It seems simple enough.

Pick up the rifle.
Pull the trigger.

It's far more complicated and demands the respect and knowledge of the operator to shoot properly. Do yourself a favor and start there.

As for the RDS, your medium riser will give you ABSOLUTE co-witness with your front irons. A tall riser with give you 1/3 co-witness. Take the time to research the rifle first and proper technique. Then, research optics and MOA. You'll be surprised by how much you don't know and how much respect you gain for the sport.