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2. Smith & Wesson Model 3 - Wikipedia

   en.wikipedia.org/wiki/Smith_&_Wesson_Model_3

   Sights. Fixed front post and rear notch. The Smith & Wesson Model 3 is a single-action, cartridge -firing, top-break revolver produced by Smith & Wesson (S&W) from around 1870 to 1915, and was recently again offered as a reproduction by Smith & Wesson and Uberti. It was produced in several variations and subvariations, including both the ...

3. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

4. NATO Accessory Rail - Wikipedia

   en.wikipedia.org/wiki/NATO_Accessory_Rail

   NATO Accessory Rail (STANAG 4694) The NATO Accessory Rail (NAR), defined by NATO Standardization Agreement (STANAG) 4694, is a rail interface system standard for mounting accessory equipment such as telescopic sights, tactical lights, laser aiming modules, night vision devices, reflex sights, foregrips, bipods and bayonets to small arms such as rifles and pistols.

5. Picatinny rail - Wikipedia

   en.wikipedia.org/wiki/Picatinny_rail

   It is similar in concept to the earlier commercial Weaver rail mount used to mount telescopic sights, but is taller and has wider slots at regular intervals along the entire length. The MIL-STD-1913 locking slot width is 0.206 in (5.23 mm). The spacing of slot centres is 0.394 in (10.01 mm) and the slot depth is 0.118 in (3.00 mm). [7]

6. AN/PVS-4 - Wikipedia

   en.wikipedia.org/wiki/AN/PVS-4

   AN/PVS-4 (Night Vision Sight, Individual Served Weapon, AN/PVS-4) is the U.S. military designation for a specification of the first second generation passive Night vision device. The AN/PVS-4 first saw widespread use during the Gulf War and later some deployment in the Iraq War and has since been replaced by modern third-generation weapon sights.

7. Tape diagram - Wikipedia

   en.wikipedia.org/wiki/Tape_diagram

   A tape diagram is a rectangular visual model resembling a piece of tape, that is used to assist with the calculation of ratios and addition, subtraction, and commonly multiplication. It is also known as a divided bar model, fraction strip, length model or strip diagram. [citation needed] In mathematics education, it is used to solve word ...

8. Theodolite - Wikipedia

   en.wikipedia.org/wiki/Theodolite

   Theodolite. A direct-readout theodolite, manufactured in the Soviet Union in 1958 and used for topographic surveying. A theodolite (/ θiˈɒdəˌlaɪt /) [1] is a precision optical instrument for measuring angles between designated visible points in the horizontal and vertical planes. The traditional use has been for land surveying, but it is ...

9. Altazimuth mount - Wikipedia

   en.wikipedia.org/wiki/Altazimuth_mount

   A Newtonian telescope on a simple Dobsonian mount. An altazimuth mount or alt-azimuth mount is a simple two- axis mount for supporting and rotating an instrument about two perpendicular axes – one vertical and the other horizontal. Rotation about the vertical axis varies the azimuth (compass bearing) of the pointing direction of the instrument.