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  2. AR-57 - Wikipedia

    en.wikipedia.org/wiki/AR-57

    The AR-57 PDW upper is a new design on AR-15/M16 rifles, blending the AR-15/M16 lower with a lightweight, monolithic upper receiver system chambered in 5.7×28mm. This model is also sold as a complete rifle, supplied with two 50-round P90 magazines. [1]

  3. List of AR platform cartridges - Wikipedia

    en.wikipedia.org/wiki/List_of_AR_platform_cartridges

    .17 Mach IV.17 Remington Fireball.17 Remington [2].17-223 [4].20 Practical [5] (wildcat).20 GPC (wildcat).22 GPC (wildcat).204 Ruger [2]; 22 Grendel (wildcat) aka 224 Grendel

  4. 7.5 FK - Wikipedia

    en.wikipedia.org/wiki/7.5_FK

    The 7.5 BRNO was developed between 2009 and 2014, for the specific purpose of providing high capacity automatic pistols the ability to engage combatant targets at a range of between 75–150 metres (82–164 yd) while retaining more kinetic energy at that range than a 9×19mm Parabellum cartridge can generate at the muzzle/point blank range.

  5. SIG MCX - Wikipedia

    en.wikipedia.org/wiki/SIG_MCX

    SIG designed the upper receiver to be compatible with standard AR-15 and M16 lower receivers [10] [12] with the help of an adapter. [15] An integrally suppressed upper receiver group based on the MCX was selected by USSOCOM for the SURG (Suppressed Upper Receiver Group) contract in July 2018. These suppressed uppers would be paired with ...

  6. TEC-9 - Wikipedia

    en.wikipedia.org/wiki/TEC-9

    The KG-9 and KG-99 have an open-end upper receiver tube where the bolt, recoil springs, and buffer plate are held in place by the plastic/polymer lower receiver frame. This design only allows for 115 grains (7.5 g) 9mm ammunition, and if a heavier grain ammunition or hot loads are used, the plastic lower receiver will fail or crack, rendering ...

  7. 5.45×39mm - Wikipedia

    en.wikipedia.org/wiki/5.45×39mm

    The 5.45×39mm cartridge is a rimless bottlenecked intermediate cartridge.It was introduced into service in 1974 by the Soviet Union for use with the new AK-74.The 5.45×39mm gradually supplemented and then largely replaced the 7.62×39mm cartridge in Soviet and Warsaw Pact service as the primary military service rifle cartridge.

  8. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    A Nexus 6, an Android smartphone, displaying the Main Page of the English Wikipedia. A smartphone, often called simply a phone, is a mobile device that combines the functionality of a traditional mobile phone with advanced computing capabilities.

  9. List of free and open-source software packages - Wikipedia

    en.wikipedia.org/wiki/List_of_free_and_open...

    This is a list of free and open-source software packages , computer software licensed under free software licenses and open-source licenses. Software that fits the Free Software Definition may be more appropriately called free software ; the GNU project in particular objects to their works being referred to as open-source . [ 1 ]