glock sights question

my dad just got a glock 17 impressed with it overall but both of us kept shooting low, 6 inces at ten yards and at least twelve at 20 yds, we were both keeping sights parallel and placing the bullseye on top of the sights, even bench resting the gun shot low are different height front sights available?

...kept shooting low, 6 inces at ten yards and at least twelve at 20 yds, we were both keeping sights parallel and placing the bullseye on top of the sights, even bench resting the gun shot low are different height front sights available?
I don't know about different height factory front sights, but they do have different height rear sights:
http://www.glock.com/english/options_rearsight.htm
However, I don't think they will have enough offset (0.108 in. http://www.ameriglo.net/sights/calculator) for your dad's pistol.
I suggest you contact Glock about getting the G17 to shoot to your point of aim or purchase aftermarket sights (different height front and rear sights are available).
Regards,
Greg

File your sights intil it shoots right.

Then just do the math to get the proper height aftermarket sights. Dawson offers custom built sights as well.

If you file your front sight down to .080" and it works, but only .090" aftermarket sights are available, then just add .010" to your rear sight etc.etc.

Sometimes it makes sense to raise the rear instead of lower the front.

Don't forget to try different ammo.

Are we sure this a sight problem? Have you shot it from a bench rest? Definitely find out if it is a sight problem before you go grinding them off. Contact glock and see what they suggest.

You were using a 6 o'clock target/bullseye hold. Glocks are sighted in for a "combat" hold. The bullet is supposed to go where the white dot is. I believe it is even stated as such in the manual. So there's nothing unusual about your results.

Give the Glock another try with the combat hold before you buy new sights.

It might take some getting used to, but I prefer the combat setup. You can revert to a guesstimated 6 o'clock picture when shooting fast and/or at moving targets by tipping the front sight slightly above the rear sights. This way, your front sight can't get lost behind the rear sight.

You were using a 6 o'clock target/bullseye hold. Glocks are sighted in for a "combat" hold. The bullet is supposed to go where the white dot is...
Excellent point! I was thinking POA/POI when offering up the offset in my other post. That should be ignored now (if further testing proves it still shoots low, use the calculator to figure the new offset). My thanks to GLOOB for bringing this up.
Regards,
Greg