What do you sight your buis in at ?

[Brianma65]

I'm putting a colt ar 15 together ( SA20 lower,6920 upper.) And was wondering is there a best distance to sight it in at? Thanks

 

[CanAR15]

All my buis are 50
Non magnified optics I do at 50, magnified optics (Acog, DR, Viper) are 100. Personal preference though.

 

[9Guns]

I sight in at 50 because out to 200M it is within 2" of the point of aim. Due to the height above bore axis the rifle should be close to on at 50 and 200.

 

[bkelly4790]

What sights are you running? If you have ones that have preset elevation adjustments the easiest is to set the elevation for 200m zero at 50m using only the adjustment in your rear sight then step back to 200 and fine tune with front sight adjustments. For sets without preset elevations on the rear just basically zero at 50 and confirm and fine tune if necessary at 200.

 

[skypilot]

Usage and terrain usually dictate that. 50/200 is likely standard for for most civilians.

Maybe 25/300 if you can tolerate high ordinate or targets are mostly @200+.

In the piney woods of East Texas a 100m zero was just right. West Texas was more suited to 25/300 zero.

 

[Brianma65]

Magpul Mbus and FSP on 6920.

 

[9Guns]

25/300 tends to be a little more off in 50-100 shooting. For a backup 300 is about the max one would be typically shooting. Depends on the sight too. The M16a2 irons were meant to be sighted in at 200 then the elevation drum adjusts the rest out to 800.

 

[9Guns]

I would use a 25/300 zero if I planned on using only irons especially the older M16A1 style non adjustable irons.

 

[lerch641]

100m.

Why not? All the adjustments are in 100's, not 50's.

 

[DILLIGAF]

mine are zeroed in my parts bin ...lol... Never used BUIS in 5 years of shooting so I no longer mount them.

 

[9Guns]

100 M is fine it is just a little off in close quarters.

 

[rdavidson]

300blk = 25/200
556 = 50/200 though I am going to 25/300 for new build
7.62x39 = 25/200

 

[lone-wolf]

100yrds, I don't shoot closer than that.

 

[ponymusic]

There is some very useful information here:

http://gunwebsites.net/wp-content/uploads/2015/05/Guns-AR15-Zero-Introduction.pdf

 

[JR Hartman]

the 36 yard "marine" zero makes sense, but I forget the reason.

I personally use a 2" low at 25m. Again, I don't have all the exact drops and distances off hand, but it works well in all distances I can shoot at.

 

[Gundoggy]

3 inches high at 100 yards.

I sight in my Red dot and even my Trijicon 1-4 scope with this technique too.

http://www.combatshootingandtactics.com/published/thebattlefieldzerofullpictures.pdf

 

[Bobbum Man]

I sight in at 50 because out to 200M it is within 2" of the point of aim. Due to the height above bore axis the rifle should be close to on at 50 and 200.

I've typically gone this route ^

 

[ponymusic]

3 inches high at 100 yards.

I sight in my Red dot and even my Trijicon 1-4 scope with this technique too.

http://www.combatshootingandtactics.com/published/thebattlefieldzerofullpictures.pdf

Very interesting. Thank you for the link Gundoggy.