XD Talk

daredevil · 01-10-2009, 02:36 PM

Quote:

Originally Posted by mvician

The rear sight is RANGE adjustable........the front is where you adjust ELEVATION for a specifc range.

huh? I was just talking about adjustments to zero.

I have Troy sites, so are you telling me if something was 800 yards away I can adjust the front to get the correct range?

mvician · 01-10-2009, 02:53 PM

Quote:

Originally Posted by daredevil

I don't know how I missed this one. Adjusting the front site is the old way of doing things. You do know that is why the M16A3 sites were created right? It is so much easier when you can make all the adjustments from the rear.

To summarize, the "HK Style" rear site has both windage and elevation adjustments, and get this, it also has a BDC! the rotating drum works much like the way a BDC does.

Quote:

Originally Posted by mvician

The rear sight is RANGE adjustable........the front is where you adjust ELEVATION for a specifc range.

Quote:

Originally Posted by daredevil

huh? I was just talking about adjustments to zero.

I have Troy sites, so are you telling me if something was 800 yards away I can adjust the front to get the correct range?

Let's review.......

you said

"Adjusting the front site is the old way of doing things. You do know that is why the M16A3 sites were created right? It is so much easier when you can make all the adjustments from the rear."

to which I replied

The rear sight is RANGE adjustable........the front is where you adjust ELEVATION for a specifc range.

and now you come up with

"I have Troy sites, so are you telling me if something was 800 yards away I can adjust the front to get the correct range?"

What don't you understand ?

Rear sight adjustments are windage and if equipped range.
Front sight adjustment is for elevation at a given range.

daredevil · 01-10-2009, 04:01 PM

How do you adjust the front site for a specific range?

mvician · 01-10-2009, 04:26 PM

One method of sighting in an AR15

AR15.COM :: Guides

The AR-15 rifle has two adjustable sights- front and rear. Zeroing elevation adjustments are made using the front sight, and windage adjustments with the rear.
The rear sight has an elevation knob with range indicators from 300 to 800 meters and two apertures for range. One aperture is marked 0-2 for short range from 0-200 meters and the unmarked aperture for normal range from 300 to 800 meters. This unmarked aperture is used in conjunction with the elevation knob for 300-800 meter targets.

The rear sight also consists of a windage knob on the right side of the sight. Each click of the windage knob will move the strike of the round from 1/8 inch at 25 meters to 4 inches at 800 meters. A windage knob pointer is on the windage knob.
The front sight consists of a rotating sight post with a spring loaded detent. This detent can be depressed using a sight adjustment tool, or using a sharp point such as a cartridge tip.
Establish Zero
The following procedure will establish a zero at 25 meters, and your AR-15 will be set with a 300 meter battlesight zero. This means that all shots will be within a 9" circle at all ranges up to 300 meters.

Establish Mechanical Zero -

Align the windage indicator mark on the 0-2 aperture with the center line of the windage scale (the unmarked aperture is up)
Rotate the elevation knob down until the range scale 8/3 (300-meter) mark is aligned with the mark on the left side of the receiver.
Rotate the front sight post up or down as required until the base of the front sight post is flush with the top of the sight post well.

Carefully aim and fire each shot of a 3-shot group at a paper target set up at 25 meters. If your shots are not striking the point-of-aim, then adjust your sights.

To raise the next shot group, rotate the front sight post in the direction marked UP (clockwise)
To lower the next shot group, rotate the front sight post in the direction marked DOWN (counter-clockwise)
To move the next shot group left, turn windage knob counterclockwise
To move the next shot group right, turn the windage knob clockwise

Continue to fire 3-shot groups and adjust the sights until you have a tight group at the point of aim.
Once this is done, the unmarked aperture is automatically zeroed. Rifle is now combat-zeroed all other ranges on the elevation knob are also zeroed, so to engage target at say 500 meters, turn wheel to 5.

daredevil · 01-10-2009, 04:37 PM

That is from an FM for an A2 site it appears. But A3 sites you adjust the elevation with the rear.

Also that manual does not say how you adjust the front site for a specific range.

Again I ask.. "How do you just the front site for a specific range?"

JhankG · 01-10-2009, 04:39 PM

Head over to the AR forum's EE and pick up a good used pair. I got my flip up MI rear sight for a good price.

mvician · 01-10-2009, 04:52 PM

Quote:

Originally Posted by daredevil

That is from an FM for an A2 site it appears. But A3 sites you adjust the elevation with the rear.

Also that manual does not say how you adjust the front site for a specific range.

Again I ask.. "How do you just the front site for a specific range?"

Pick a range, say 50 yards, sight in your rifle, adjust elevation with the front sight, windage with the rear. That's it, plain and simple.

Now I ask you to show me an A3 sight.

Joeywhat · 01-10-2009, 05:05 PM

Quote:

Originally Posted by mvician

Now I ask you to show me an A3 sight.

You haven't seen it? It's the one where you can adjust elevation with the rear sight

daredevil · 01-10-2009, 05:24 PM

Quote:

Originally Posted by mvician

Pick a range, say 50 yards, sight in your rifle, adjust elevation with the front sight, windage with the rear. That's it, plain and simple.

Now I ask you to show me an A3 sight.

Oh I get it now, you can only adjust for one range, now don't you do that for all sites? I thought you were talking about on the fly adjustments with the front site for ranging, similar to the diopter sites of the HK, which the Troy does not have. Even my M1903 made in 1917 has a ranging adjustment.

I might be getting my nomenclature mixed up, the M16A2 sites I carried did not have a rear elevation adjustment, my M16A3 did. Both had non re-movable carry handles. My Bushmster Carry removable carry handle that I recently sold had an A3 style site.

Let me know if the words I am using are too big for you.