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Old 10-30-2013, 10:27   #1
Slalom.45
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Ameriglo front sight post height?

I am planning to order a set of Ameriglo i-dot pros to replace the factory sights my Gen 4 17. On the normal web sites you have the option of ordering +0 or +1 for height. I was told that the +1 was typically for long slide target guns and the +0 was stock height.

On the Ameriglo web site they have a front sight height calculator based on how high (low) you are hitting at a set distance with a lot of options.

My question is this. I do shoot slightly high with the (new) G 17 vs. my G 21 with old trijicon 3 dots. For any of you who have used the calculator is it worth trying to get the "perfect" height, or should I just order the +0 and get used to it? Use will be IDPA type shooting. Thanks.
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Old 10-30-2013, 11:22   #2
JBP55
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The I Dot pro sights are taller front and rear vs. all their other sights.
Only the large frame Glocks need the + rear sight.
Just order the one for your pistol which is the same for all small frame Glocks which is GL-301.
You can not mix the regular sights front/rear with the I Dots because of the height difference.

Last edited by JBP55; 10-30-2013 at 11:26..
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Old 10-30-2013, 12:23   #3
Tiro Fijo
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Each & every gun shoot to POA differently. Out of 10 NIB Glocks approx. 2 or 3 will shoot high. I've seen two G17's recently that needed 0.250" FS to be on at 15 yds. Use the Ameriglo calculator as it is dead nuts on.
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Old 10-30-2013, 12:52   #4
JBP55
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I have installed more than 200 sights on Glocks and I have never seen one off by 7" at 15 yards. They have all been very close at 25 yards unless the wrong sight was installed by someone. Anything is possible but I have not seen this occur yet.
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Old 10-30-2013, 13:32   #5
Paul53
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Once you decide, check your holsters carefully. I loved my iDot pros right up the day the Kydex ripped the front sight off. Some Kydex holsters will specifically say they have a "sight channel."
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Old 10-31-2013, 13:36   #6
Slalom.45
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I didn't realize that the i dots were taller sights. Is there a functional reason for them being taller? Are there many of you who have used them that had issues with snagging on holsters or clothing. Thanks again.
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Old 10-31-2013, 13:44   #7
JBP55
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Quote:
Originally Posted by Slalom.45 View Post
I didn't realize that the i dots were taller sights. Is there a functional reason for them being taller? Are there many of you who have used them that had issues with snagging on holsters or clothing. Thanks again.

Some shooters say they pick the taller sights up faster.
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Old 10-31-2013, 13:50   #8
JBP55
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Quote:
Originally Posted by Slalom.45 View Post
I didn't realize that the i dots were taller sights. Is there a functional reason for them being taller? Are there many of you who have used them that had issues with snagging on holsters or clothing. Thanks again.

If you used a rear I Dot with a regular height front sight on a G17 you would shoot approximately 10" high at 25 yards.

If you used a front I Dot with a regular height rear sight on a G17 you would shoot approximately 10" low at 25 yards.
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