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  2. Gun serial number - Wikipedia

    en.wikipedia.org/wiki/Gun_serial_number

    A gun serial number is a unique identifier assigned to a singular firearm. [A] There is no international uniformity in gun serial numbers. Besides a widespread numerical base, they may contain letters and other typographical symbols, or may consist entirely of a character string; positioning and form of such identifiers is idiosyncratic. [1] [3]

  3. Miller twist rule - Wikipedia

    en.wikipedia.org/wiki/Miller_twist_rule

    When computing using this formula, Miller suggests several safe values that can be used for some of the more difficult to determine variables. For example, he states that a mach number of M {\displaystyle M} = 2.5 (roughly 2800 ft/sec, assuming standard conditions at sea level where 1 Mach is roughly 1116 ft/sec) is a safe value to use for ...

  4. Forensic firearm examination - Wikipedia

    en.wikipedia.org/wiki/Forensic_firearm_examination

    By examining unique striations impressed into a bullet from the barrel of a gun, expended ammunition can be linked back to a specific weapon. [1] These striations are due to the rifling inside the barrels of firearms. Rifling spins the bullet when it is fired out of the barrel to improve precision. [2]

  5. Fancy Serial Numbers Turn Dollar Bills Into Pricey Collectors ...

    www.aol.com/news/on-fancy-serial-numbers-dollar...

    As such, it seems you'll get the most value in trade if you find the weird serial number on a lower denomination -- getting $200 for a dollar bill is a lot more profitable than the same amount for ...

  6. How to Find Out Who Owns a Gun Permit: Learn If Your ... - AOL

    www.aol.com/news/2012-12-28-how-to-find-out-who...

    The only gun registries that do exist are state registries. Only a minority of states have them, however, since most states do not require residents to obtain a permit to purchase a firearm.

  7. Guns at Home: Do Neighborhoods' Firearms Permits Lower ... - AOL

    www.aol.com/news/2013-01-16-gun-permits-home...

    Across Westchester, Rockland and Putnam Counties, for example, there are approximately 44,000 individuals with gun licenses. That's one out of every 23 adults, a figure that most likely isn't a ...

  8. Gun buyback program - Wikipedia

    en.wikipedia.org/wiki/Gun_buyback_program

    While Seattle's 2013 gun buyback program could be considered a success, collecting more than 700 guns, handing out almost $70,000 in gift cards and even netting a Stinger missile launcher tube, [31] the program also had a widely unanticipated effect from the local gun buying community. Hundreds of gun buyers showed up to the event seeking to ...

  9. Mathematical discussion of rangekeeping - Wikipedia

    en.wikipedia.org/wiki/Mathematical_discussion_of...

    Figure 1: Rangekeeper Coordinate System. The coordinate system has the target as its origin. The y axis value range to the target. US Navy rangekeepers during World War II used a moving coordinate system based on the line of sight (LOS) between the ship firing its gun (known as the "own ship") and the target (known as the "target").