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| | DEAD-EYE: Combat Optics |
 | | These sights, either fabricated as an integral part of the weapon or added as an optional item, were introduced in the 17th century and remain in use today. |
 | | Truly adjustable iron sights, which could be adjusted to compensate for bullet trajectory, did not become available until the middle of the 18th century. |
 | | While they serve the same purpose as fixed sights, either the front or rear sight is adjustable (or in some cases, both), aligning the sights with the actual strike of the bullet. |
| www.military.com /soldiertech/0,14632,Soldiertech_CombatOptics,,00.html (1804 words) |
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