| 21. | The rifle is to be used exclusively with optical sights, as the iron sights were removed.
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| 22. | However, Aimpoint electronic optical sights are still allowed.
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| 23. | A length of Picatinny rail is installed on the carrying handle to accept various optical sights.
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| 24. | The British army fields the SA80 rifle with the SUSAT 4?optical sight as standard issue.
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| 25. | The turret also included independently stabilized optical sights and a laser range finder for manual engagements.
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| 26. | Zone plates have been proposed as a cheap alternative to more expensive optical sights or targeting lasers.
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| 27. | Only an optical sight could do it.
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| 28. | Most wartime optical sights like the Mk.
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| 29. | The rifle can also be fitted with a mounting system for optical sights and a blank-firing adaptor.
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| 30. | The B-4 FCS proved troublesome, and in some B-47Bs, it was replaced with an N-6 optical sight.
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