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Sighting in the new Legion

This is a discussion on Sighting in the new Legion within the Legion Series forums, part of the SIG Sauer Pistols category; Merry Christmas everyone. After the traditional gift opening ceremony, I took my son (who proudly serves in the Navy) and my new Legion to the ...


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Old 12-25-2016, 12:13 PM   #1
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Sighting in the new Legion

Merry Christmas everyone. After the traditional gift opening ceremony, I took my son (who proudly serves in the Navy) and my new Legion to the range (P226 SAO). We both discovered and agreed the gun shoots 3 and 1/2 inchs to the left and 1/2 low. What must I do to adjust the sights?

Thanks,

Kat
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Old 12-25-2016, 12:50 PM   #2
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Firstly look down on the slide to see if either front or back sight is obviously off to one side or the other. SIG, sadly, often does not get the sights centered on the slide.

Couple of options, adjust sights for windage yourself, take to gunsmith or store (maybe) where you made the purchase, or send to SIG.

If you have a caliper to measure distances accurately, you can hold a straight edge along a flat of the side so the straight edge comes up vertically to be even the the top of the sight. Then measure the distance between the "sight side" of the straight edge and either the blade of the sight or the notch, or side of the sight - whatever is most convenient. Then repeat on the opposite side of the sight to determine if the sight is centered, or if off, by how much and it what direction.

If you will be adjusting sights yourself, there are formulas that take into account sight radius, distance to target, and by how much the group is off POA to POI to arrive at how many thousandths of an inch the sight/s need to be moved. Before adjusting sights, it's best to sight in off bags so the human factor is removed as much as possible. You didn't say what distance you were shooting, but half an inch off vertically isn't much, good because to correct that slight an error you would probably be going past it up or down changing sights. Windage is much easier to deal with.

Some will drift the sights with punch and hammer, but most gunsmiths use a sight pusher as a good one reduces the risk of sight damage and is the "proper" way to do the job. Cheap pushers are just that, sometimes work and people swear by (or at) them. I use a MGW Sight Pro (pricey to what's sold on eBay, but a quality tool and worth it). You can buy a used MGW pistol or "line" specific excellent quality pusher for little more than $100 used and not much more new. Lots of threads on this.

Merry Christmas and good luck.
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Old 12-25-2016, 01:34 PM   #3
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While bumper makes some good recommendations, I believe the first step one should take is to determine POA/POI shooting from a rest. Let's remove as much operator influence as possible. I have several SIG's with sights that are not centered side to side, some worse than others.
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Old 12-25-2016, 09:16 PM   #4
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While I have a sight pusher I've used a hammer and punch a lot too, I use a brass punch then clean the marks off the sight with Sweets afterwards. I also make a small mark with a sharp pencil first to see how far I'm moving it.
3.5" @25yds is about .024", moving the rear sights are easier or less apt to mess them up then the front. I wish I could call 1/2" at that range
Good luck and enjoy.
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Old 12-25-2016, 09:27 PM   #5
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Originally Posted by markm View Post
While I have a sight pusher I've used a hammer and punch a lot too, I use a brass punch then clean the marks off the sight with Sweets afterwards. I also make a small mark with a sharp pencil first to see how far I'm moving it.
3.5" @25yds is about .024", moving the rear sights are easier or less apt to mess them up then the front. I wish I could call 1/2" at that range
Good luck and enjoy.
If you use some of that pencil lead on the sight before you use the brass punch it will help prevent the brass from coloring the finish.
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Old 12-26-2016, 04:53 AM   #6
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Thank you so much guys. My expertise is with rifles as I build them myself. Pistols...learning how to love them. Is it a a complicated job do attempt this with a punch and a hammer and can/should I do this at the range to check as I go along? Also are the sights pushers universal or do I need one for Sig sights? And if I need to move the point of impact right I will have to move the sights right correct?
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Last edited by cat64; 12-26-2016 at 04:56 AM.
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Old 12-26-2016, 05:18 AM   #7
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to get the results you're seeing, both are using the same technique.

you should be using sight image 3.
Attached Images
File Type: jpg Finger Placement On Trigger.JPG (118.1 KB, 96 views)
File Type: jpg Shooting.jpg (27.6 KB, 90 views)
File Type: jpg Sighting.JPG (24.7 KB, 101 views)
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Old 12-26-2016, 05:35 AM   #8
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Rear sight - move in direction that shot group needs to move

Front sight - opposite direction

It is generally considered a bad idea to use a hammer and punch with tritium night sights - the glass vials and bonding agent can be damaged by impact.

You would regret not buying the pusher if you damage the pistol or the sights!

Sigs tend to be addicting, so you can probably rationalize the cost of the pusher.
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Old 12-26-2016, 06:04 AM   #9
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Also are the sights pushers universal or do I need one for Sig sights? And if I need to move the point of impact right I will have to move the sights right correct?

You can buy sight pushers that are gun specific (about $100 each), but pretty soon you will have spent more than buying one universal pusher.
As already mentioned by Bumper, the MGW Sight Pro is top of the line and you'll never regret the investment.

If your front sight is the one that needs adjustment -- then, looking down the gun from rear to front (as you would normally be doing), you move the sight in the same direction as POI from your test firing. If it is the rear sight that is off, you go in the opposite direction from POI.

For all my handguns, I adjust only at two distances -- 7 yds and 10 yds. If I try going out to 15 yds, I have trouble maintaining any accuracy for what is needed for correct adjustment.

Also, you didn't mention the distance you were firing at. Regardless, if you are only off by 3" or so, it won't take much movement of say the front sight to correct. I do it in stages. I find the top dead center of the barrel (which may not be the same as the center of the slide) and mark it with a thin-lead pencil. I then assess how much off (and in what direction) the sight is. If it is quite obvious, then I will simply center it up and do another test firing. If my POI is still off, I will move the sight about one pencil line thickness in the correct direction as explained two paragraphs above.
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Last edited by DerBiermeister; 12-26-2016 at 06:15 AM.
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Old 12-26-2016, 12:05 PM   #10
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Personally, it's hard to make recommendation without knowing your experience. You didn't mention caliber, distance or ammo, off-hand, benched, number of rounds...

That said, SIG advertises the P226 to be Combat Sighted for 25yds. I'd give it some time as its new, to make sure it's not grip or otherwise that's off. If still off after a few hundred rounds, a few range trips and plenty of dry firing, I would just send it back to SIG if its that off.

I did just that and it came back, didn't cost a cent, rear sight changed and GS report with sample target post fix. No need to buy a pusher or do anything if it is off. Be forewarned, if "within" spec, you'll pay return shipping and ammo cost. Is why it's worth giving it a little time in my opinion.

Anyways, good luck!
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Last edited by Cooolone; 12-26-2016 at 12:08 PM.
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Old 12-26-2016, 01:23 PM   #11
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Quote:
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...

you should be using sight image 3.
I'm new to this but why image 3 and not image 2 -- because of the distance?
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Old 12-26-2016, 01:24 PM   #12
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to get the results you're seeing, both are using the same technique.

you should be using sight image 3.
Awesome post bearone2
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Old 12-26-2016, 02:08 PM   #13
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I'm new to this but why image 3 and not image 2 -- because of the distance?
sigs are sighted at 25yds with sight image #3.
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Old 12-27-2016, 04:59 PM   #14
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I have a 229 Legion and thought it was shooting low, but figured out Sigs tend to need to cover the object with the front sight post, as in sight picture 3. This takes some getting used to as I am new to Sigs and more familiar with Les Baer 1911's.
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Old 12-27-2016, 06:32 PM   #15
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When I first got my hands on a SIG, I thought the "sight 3" thing was pretty strange. Took a while to warm up to it, being used to a 6 o'clock bullseye hold.

SIGs were built to be combat guns, and for their combat sight picture you cover the point on the bad guy with the front dot, that's where you want the bullet to go. When you are used to shooting with that combat sight picture, it's fast and seems obvious - you focus *only* on the front sight, the rear sight and target are a little blurred.

For shooting paper bullseye, there's something to be said for 6 o'clock or center bull with iron sights, and for me, group size is better, but I don't find it as fast as #3.
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