Stock Adjustment for Standing AR

[jscot111]

Hi, I,m primarily a pistol shooter but have acquired an LG400 AR to shoot precision AR. I've searched the forum and internet on how to adjust the stock for standing but have not found anything except how to set up for prone. Any guidance would be appreciated.
Thanks, Scott

[Pat McCoy]

A "rough" start has three items. Length of pull, height of cheek-rest, and drop of buttplate.

I'd begin with the old butt in the crook of the elbow, and trigger finger on the trigger. Go shorter if you have to reach with your finger. This length will be adjusted again after getting into position with the other parameters set.

Next I'd mount the rifle, and adjust the cheek-rest so you are resting your face on it comfortably and are able to clearly see through the rear sight and see the front sight.

Next, adjust the buttplate up or down so the rifle allows your neck and shoulders to be relaxed, while maintaining the cheek placement and view of the sights.

Next, while in position take note of your wrist on the trigger operating hand. If it is bent down, you may have the length of pull too short. If It is straight, but you feel yourself "reaching" for the trigger it may be too long. Make SMALL adjustments as needed.

All this is much simpler if you get a good coach to help you, or possibly video yourself and compare your position to those in shooting books or videos (while remembering that no two positions are IDENTICAL)..

[jscot111]

Thanks for the response, your tips have got me in the ballpark. One thing that I find is my npa is above the target set at proper height.
Thanks Scott

[Pat McCoy]

NPA is a different thing entirely.

Mount the rifle (as you have it adjusted), but WITH YOUR EYES CLOSED. Relax, then open your eyes without changing the position of the rifle. Focus on how still the sights are. Once you have that PICTURE in your mind, consider if you want to be aiming higher , lower, left or right.

Higher or lower MAY entail an vertical adjustment of the buttplate, OR by moving your feet SLIGHTLY together or apart the vertical poa will change (apart to go higher, together to go lower). Horizontal adjustment is by moving the foot (usually rear) very slightly right or left. I sometimes mover my front foot inside of my boot for very small horizontal adjustments.

[jscot111]

I was able to get the rifle adjusted and was happy with the results. Then I installed a sight riser (block club) readjusted the stock but now was shooting very low out of the black. I have dialed in all the up in the sights and it still shoots low. Its the Walther Sport Diopter, any suggestions?
Thanks Scott

[Tim S]

Scott,

Have you put risers under both sights? Normally risers are used as a pair.

[jscot111]

Yes, riser under both sights. I have clicked in all the elevation the sights have and have a centered group below the 10 around the 7-8 ring.

[Tim S]

You may need more riser under the rear. Try the 4mm steps in your Centra Club set under the rearsight only. You'll then be high, but should have enough elevation to click down.

[jscot111]

Changing the height of the pillars got me back to normal. Used 8mm in front and 10mm in the rear. Thanks for the suggestion.
Scott