Saturday, December 8, 2012

How To Zero Your AK 74



I go through one way to zero your AK-74 (and variant) rifle. I suggest either doing it the way I do in the video or just using the battle setting and zeroing point of aim=point of impact.

Basic front sight adjustments:

If you want to move the group to the right-----move the front sight left.
If you want to move the group to the left----move the front sight right.
If you want to lower your group, raise the front sight (counter clockwise)
If you want to raise your group, lower the front sight (clockwise)



Ballistics numbers of the 7N6 round:

Bullet weight - 3.42 grams (53gr)
initial velocity, according to the manufacturer - 870 m / sec (2854 ft/s)
Ballistic coefficient: 0.282

Below is some data taken from a 1980s Russin AK74 manual:

Velocity in ft/sec
Distance in meters
0 = 2970 (note this is for the particular 5.45x39 round in use at the time)
100 = 2673
200 = 2340
300 = 2056
400 = 1792
500 = 1508
600 = 1310

Wind Drift for 10mph at 90 deg.
100 = 1.2in
200 = 4.3in
300 = 9.1in
400 = 20.5in
500 = 34.3in
600 = 52.8in

Bullet drop in inches
Zero at 100 meters (sight set at 1)
50m = 0
100m = 0
150m = -1.2
200m = -3.9

Zero at 200 meters (sight set at 2)
50m = 1.2
100m = 2
150m = 2
200m = 0
250m = -3.9
300m = -9.8

Zero at 300 meters (sight set at 3)
50m = 2.4
100m = 5.1
150m = 6.7
200m = 6.3
250m = 4.3
300m = 0
350m = -6.7
400m = -16.9

Zero at 400 meters (sight set at 4)
50m = 4.3
100m = 9.4
150m = 13
200m = 15
250m = 14.6
300m = 12.6
350m = 7.9
400m = 0
450m = -10.6
500m = -25.6

Zero at 500 meters (sight set at 5)
50m = 7.1
100m =14.6
150m = 20.9
200m = 25.2
250m = 27.6
300m = 28.0
350m = 25.6
400m = 20.5
450m = 12.2
500m = 0
550m = -16.5
600m = -38.6


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