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Old 06-12-2013, 11:29   #1
34Gee
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Can certain night sights reduce sight radius?

For example, TRU-GLO sights are made so that the actual 'dot' of the front sight will sit further back on the slide then the OEM sight or some Trijicons. If I understand sight radius correctly, would this have an affect on accuracy?
I have a Glock 17 that I want to put night sights on and prefer the TRU-GLO's but would I be hampering accuracy with these?
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Old 06-12-2013, 12:28   #2
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Techincally, I guess. Practically, I think it would be negligible.
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Old 06-12-2013, 12:42   #3
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Originally Posted by GSD17 View Post
Techincally, I guess. Practically, I think it would be negligible.
GSD 17 said it all right there. SJ 40
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Old 06-12-2013, 14:24   #4
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Originally Posted by GSD17 View Post
Techincally, I guess. Practically, I think it would be negligible.
This.

An eighth of an inch closer setup on a 5" barrel is a 2.5% difference in the sight radius.
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Old 06-12-2013, 15:01   #5
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On a 17 probably won't matter. On a 26 might make a difference, the TFOs in particular are quite long.
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Old 06-12-2013, 15:23   #6
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Those TFO sights are not very durable, only have a 90 day warranty and must be purchased as a set.
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Old 06-12-2013, 17:45   #7
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Sight radius on my 31 with Tru Dots is 6 3/8". Sight radius on my 32 with Ameriglo hacks is 6 3/32". Sight radius on my 33 with Ameriglo hacks is 5 1/2". Due to length of the front sight on the Tru Glos I would say on a 17 they would have a sight radius between my 32 and 33 which have the Hack sights. I prefer to maximize the radius and don't like large sights so the hackathorn sights suit me well.

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Old 06-12-2013, 20:16   #8
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I'd opine it makes very little difference. I think the longest conventional sight radius you could get would be an OEM adjustable rear and a polymer front. I had a steel OEM rear and a polymer front briefly on a G17. The white outline was practically at the edge of the rear of the slide, and the dot was as far out front as can be. I replaced the polymer front with a 2012 OEM tritium sight (Glock-manufacture), and it didn't make any difference at all downrange. Handgun accuracy is really more about grip, trigger press, and sight alignment than anything else.
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Old 06-12-2013, 22:02   #9
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Quote:
Originally Posted by AgentM79 View Post
I'd opine it makes very little difference. I think the longest conventional sight radius you could get would be an OEM adjustable rear and a polymer front. I had a steel OEM rear and a polymer front briefly on a G17. The white outline was practically at the edge of the rear of the slide, and the dot was as far out front as can be. I replaced the polymer front with a 2012 OEM tritium sight (Glock-manufacture), and it didn't make any difference at all downrange. Handgun accuracy is really more about grip, trigger press, and sight alignment than anything else.
The old style (late 80's) GLOCK adjustable sights actually hung off the back of the slide by about 1/4 inch.

They snapped off easily - which is why they are the "old" style.
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Old 06-12-2013, 23:25   #10
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The old style (late 80's) GLOCK adjustable sights actually hung off the back of the slide by about 1/4 inch.

They snapped off easily - which is why they are the "old" style.
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Old 06-14-2013, 09:32   #11
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On a 17 probably won't matter. On a 26 might make a difference, the TFOs in particular are quite long.

I use meprolight 10226's on all my 9mm and .40 Glocks. The rear site comes to the rear of the slide. They don't make 6.9's like that so my 10mm's and 45's have the regular type.

Ameriglo made or makes some like that also and they're designed with a thin plate that a tiny hex bolt screws in so you can easily install them youreslf at home. The Ameriglo has a thinner gap in between the rear tubes.
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Old 06-28-2013, 08:15   #12
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With application to the G17, G17L, or G34, I'm with GSD17 on this one...

It is true that the effect would be more pronounced on the Compact and Sub-Compact models, but here too, how much real world difference that would make is arguable.

Put another way, by analogy, is Denver Colorado closer to the planet Jupiter than, say, Lincoln Nebraska is?

I put an AmeriGlo steel white dot front sight blade on my new G26 EDC, paired with a Glock OEM steel rear sight. While the AmeriGlo sight blade places the dot closer to my eye than the OEM nub sight did, the Glock steel rear sight overhangs the dovetail by at least that much (though it does not overhang the slide), offsetting the offset, so nothing's lost with the new setup. This G26 is highly accurate too, and I have far greater confidence in the steel sights!

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Old 06-28-2013, 08:53   #13
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Those TFO sights are not very durable, only have a 90 day warranty and must be purchased as a set.

In their early days, TFO's were rife with every type of product failure you could cite—it's just a fact.

Early TFO Failures Included:

1) Poor Fit
2) Poor Finish
3) Poor Workmanship
4) FO Rod Failure
5) Premature Lamp Failure
6) Poor Customer Service

As of late, the complaints regarding TFO's has fallen way off, so perhaps, they've worked the bugs out.

But TFO’s still carry about the crappiest warranty of any major sight brand out there...

Inspired by the Sig Equinox, I looked into buying a single TFO front sight back in 2006... At the time there were but two approaches:

1) Buy a set and sell or toss the unwanted rear sight.

2) Order a replacement front sight from the OEM via Cabela's.

Neither option was very cost effective. And given the crappy 90-day warranty, I ended up opting out entirely.

What I was aiming for for my new G17 was a sight setup like that found in the Sig Equinox line, where they’d paired a TFO front with a markerless, matte black, rear tritium sight. In daylight you get a FO front sight that really pops in that matte-black rear sight notch! At night you get the familiar three glowing dots, with the front dot being noticeably bigger and brighter than the two rear dots. Pretty cool... I thought to pair the green TFO front with an AmeriGlo rear—perhaps an Operator style—with yellow lamps. But alas, the TFO folks would not cooperate, and I went with a DP FO Front and a Matte-Black Adjustable Rear setup, which I’m perfectly happy with...

--Ray
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