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Old 03-06-2013, 18:27   #1
spacemonkey
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GL1010 Trijicons in a Glock 21

Is there a actual difference in dovetail size between the GL1010 Trijicons meant for the smaller frame Glocks and the GL1040s meant for the Glock 20/21? Or is it a difference in sturdiness for the snappier cartridges? I have a set of 1010s and I'd like to know before I push the stock sights out of my 21.

Thanks,

Dylan
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Old 03-06-2013, 18:41   #2
Scott30
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The difference is in the sight height making the POI different between the regular slide and the large slide. The dovetails are the same.
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Old 03-07-2013, 04:30   #3
spacemonkey
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Thanks, Scott. Is the POI radically different? The 4's are really hard to find!
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Old 03-07-2013, 17:18   #4
NewportNewsMike
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The difference in POI should be whatever the difference would be between the stock Glock 9MM sights (one liner's) and the stock 45 sights (+1's, or one short line over the basic line).

See "http://www.glock.com/english/options_rearsight.htm" for the Glock sight heights and what Glock says the POI difference would be between the different sights.

My GUESS is that the POI difference for the sights you are talking about would be about 2 inches at 25 yards. The lower rear sight height (the one you have) would cause the POI to be about 2 inches higher than the ones specified for the 45.
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Old 03-07-2013, 18:11   #5
spacemonkey
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Thanks both for you help!
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