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Old 01-15-2003, 03:31 PM   #1
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Join Date: Dec 2002
Location: Michigan
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Springfield Arms 1911 dovetail dim's. on Government model.

I want change my fixed rear sight to an adjustable sight. I have been catalog shopping and I am getting confused. Some references are to "BM #1 or LPA or a width (60 degrees x .375) etc.. Is there a cross index that gives both the common name and dovetail dimensions so that I can pick out the right one. The wide point of the fixed sight dovetail is approximately .325. (hard to measure with sight in dovetail).
 
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Old 01-16-2003, 08:09 AM   #2
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Hi Gene, are you wanting to put a Bomar sight on your pistol? exactlty what Springfield Armory model do you have? does it have a "GI spec" (small rear blade) on it? chad
 
Old 01-16-2003, 09:39 AM   #3
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The BM#1 refers to a BoMar low mount cut in a slide. An LPA is similar to a BoMar but has different dimensions. Your slide has neither and needs to be milled for either of those sights to be installed in a low mount configuration. I believe the BoMar will fit your slide without milling but it will sit very high on the slide and you'll have to replace the front sight with a really tall blade.
 
Old 01-16-2003, 10:22 AM   #4
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Dave, thats what I was thinking. I was just wondering if he possibly had a new "loaded" model with a Novak cut. I think once your cut for that Novak theres no going back to anything else? chad
 
Old 01-16-2003, 09:12 PM   #5
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Springfield Arms Mil-Spec 1911 rear sight.

I talked to a gunsmith at SA today, and he was a big help. His name is Mr. Williams. It seems that the Mil-Spec dovetail is in a class of it's own . It has a 52 deg. angle and the width is measured over wire gages. In any case he pointed me in the right direction, both Mec-Gar and Pachmyar sell an adjustable rear sight that uses the staked front sight and the Mil-Spec dovetail without any modifications or milling. So my problem is solved. The products are available from Brownells and I'm sure other suppliers. Thanks to all the responders!
 
Old 01-17-2003, 02:39 AM   #6
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I believe the Pachmayr rear sight is actually made by Mec Gar so get the one that is cheaper.
 
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