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4-12x40

MS-DOS ( em-es-DOSS; acronym for Microsoft Disk Operating System) is an operating system for x86-based personal computers mostly developed by Microsoft. Collectively, MS-DOS, its rebranding as IBM PC DOS, and some operating systems attempting to be compatible with MS-DOS, are sometimes referred to as "DOS" (which is also the generic acronym for disk operating system). MS-DOS was the main operating system for IBM PC compatible personal computers during the 1980s and the early 1990s, when it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system.
MS-DOS was the result of the language developed in the seventies that was used by IBM for its mainframe operating system. Microsoft acquired the rights to meet IBM specifications. IBM licensed and re-released it on August 12, 1981 as PC DOS 1.0 for use in their PCs. Although MS-DOS and PC DOS were initially developed in parallel by Microsoft and IBM, the two products diverged after twelve years, in 1993, with recognizable differences in compatibility, syntax, and capabilities.
During its lifetime, several competing products were released for the x86 platform, and MS-DOS went through eight versions, until development ceased in 2000. Initially MS-DOS was targeted at Intel 8086 processors running on computer hardware using floppy disks to store and access not only the operating system, but application software and user data as well. Progressive version releases delivered support for other mass storage media in ever greater sizes and formats, along with added feature support for newer processors and rapidly evolving computer architectures. Ultimately it was the key product in Microsoft's growth from a programming language company to a diverse software development firm, providing the company with essential revenue and marketing resources. It was also the underlying basic operating system on which early versions of Windows ran as a GUI. It is a flexible operating system, and consumes negligible installation space.

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Recent contents
  1. G

    Nikon P223 3x32 BDC Reticle & Bushnell Trophy XLT 4-12x40 BDC Reticle

      1. For Sale
    • $125
    • Portland
    • Oregon
    The purge continues. Here is a package of two optics. Both are in excellent condition. 1. Nikon P223 3x32 (fixed 3x) compact optic with a one-piece mount. BDC reticle. 2. Bushnell Trophy XLT 4-12x40 w/original box. BDC reticle. $125 for the pair.
  2. A

    Vortex Diamondback 4-12x40

      1. For Sale
      2. For Trade
    • $175
    • Veneta
    • Oregon
    Recently purchased from Mazamas, I didn't do my research when I bought it and I need a longer eye relief for my AR build. It was mounted, torqued to 17 inch pounds, only shot 20 rounds with it including zeroing it. Has lens caps, would like $175, no scratches from it being mounted, was only on...
  3. Mark_Dorman

    Vortex Diamondback 4-12X40 Dead-Hold BDC SFP

      1. For Sale
      2. For Trade
    • $120
    • Portland
    • Oregon
    For Sale: Great condition Vortex Diamondback 4-12X40 Rifle Scope with Dead-Hold BDC (MOA) reticle in SFP. Was mounted on a .223 Remington 700 and has been around 400 rounds (all bench rest). It's good scope, we've just gotten a lot more into precision shooting at longer ranges so need something...
  4. S

    Leupold 4-12x40

      1. For Sale
      2. For Trade
    • $200
    • Corvallis
    • Oregon
    I have a Leupold VX Freedom 4-12x40 scope for sale. Matte black finish without any obvious scratches or scope ring marks. Less than two years old. It has two tiny holdover dots for 6.5 Creedmoor but otherwise it's just a simple Duplex reticle. Asking $200 cash or trade for ammo such as 9mm, 380...
  5. OregonSig

    BNIB Vortex Diamondback 4-12X40

      1. For Sale
    • $150
    • Eugene
    • Oregon
    Selling a BNIB Vortex Diamondback rifle scope. 4-12X40 dead hold BDC, 1" tube. Sweet scope, but plans changed and I decided to go for a LVPO instead. Comes with a set of scope rings, and as always, backed by Vortex' lifetime warranty. $150
  6. G

    Bushnell Banner II 4-12x40 Scope - New with rings, manual, box, etc.

      1. For Sale
      2. For Trade
    • $75
    • Portland
    • Oregon
    Bought new at Sportsman's Warehouse this year. Mounted briefly once, then put back in the box until now. No evidence of ever being fit in rings. There are supplied rings that came with the kit that were not used. $75 cash, or might trade for a clean scope in the 4x32 range. Just looking...
  7. J

    Vortex Diamondback 4-12 x 40

      1. For Sale
    • $150
    • Portland
    • Oregon
    This Vortex is in great shape aside from the two scratches pictured. The glass is perfect on it and very clear.
  8. Tack_Ryan

    Nikon Buckmasters II 4-12x40 Scope with BDC

      1. For Sale
    • $100
    • Banks
    • Oregon
    For sale is an extremely light, clear, bright, and versatile Nikon Scope. It has a 1" tube, 4-12 magnification, which is clear at all magnifications, with built in BDC. Multicoated lenses, 1/4 inch adjustments, waterproof, shockproof, fogproof. Great scope, just don't have a rifle for it...
  9. Whisky Tahoe

    * SPF * Silver Leupold Vari-XII 4-12x40 Adj Obj Scope Made in Beaverton

      1. For Sale
    • $275
    • Portland
    • Oregon
    Update: Crosslisted on another Forum. Timestamp will be used for determining buyer. Sold pending Funds. Up for sale is a very nice Leupold hunting scope 4-12x40 with adjustable objective in silver. Included are Butler Creek see thru flip-up scope caps. $275 shipped and insured anywhere in...
  10. N

    WTT WA  Leopold Mark AR 4-12x40

    I have a very nice Leopold scope that the turrets are set up for the 223/556. It's a Mark AR 4-12x40. Looking to trade for a scope of similar value, new they are 400-500 range, just looking for a normal "hunting" scope. No tacticool stuff lol Something along the lines of a used vortex viper etc...
  11. B

    DIAMONDBACK 4-12x40

      1. For Sale
    • $165
    • Salem
    • Oregon
    Diamondback DBK-04-BDC 4-12x40 Mounted but never fired, comes with scope rings for 165$ including all factory stuff
  12. CreepingDeath

    WTS OR  Vortex Diamondback 4-12x40

    SOLD
  13. ConcernedCitizen

    WTS OR  Nikon Buckmasters II Scopes, 3-9x40 & 4-12x40, w/ BDC (NIB)

    Clearing out the last of my extra scopes, which are now just ghosts of projects long since forgotten. Hopefully these can help someone else breathe life into a new project. (2) (1) Nikon Buckmasters II Scopes, 3-9x40 w/ BDC (NIB) $75 each SOLD (2) Nikon Buckmasters II Scopes, 4-12x40 w/ BDC...
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