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  2. XM7 rifle - Wikipedia

    en.wikipedia.org/wiki/XM7_rifle

    In September 2019, SIG Sauer submitted its designs. [10] The SIG Sauer MCX-SPEAR (the rifle's commercial designation) is chambered in the 6.8×51mm (.277 in) SIG Fury cartridge in response to concerns that improvements in body armor would diminish the effectiveness of ammunition such as the 5.56×45mm NATO (for the M4 and M249) and 7.62×51mm ...

  3. SIG MCX Spear - Wikipedia

    en.wikipedia.org/wiki/SIG_MCX_Spear

    The SIG MCX Spear (stylized as MCX-SPEAR) is a multi-caliber rifle developed by the American division of SIG Sauer from the SIG MCX series of carbines. The SIG MCX Spear is primarily chambered in .277 SIG FURY but can be adapted to 7.62×51mm NATO and 6.5mm Creedmoor with a barrel change.

  4. SIG MCX - Wikipedia

    en.wikipedia.org/wiki/SIG_MCX

    The SIG MCX Pistol is the pistol configuration of the rifle with a 229 mm (9 in) barrel or 292 mm (11.5 in) barrel and comes either with the SIG Sauer SBX (pistol stabilizing brace) or SIG Sauer PCB (pistol pivoting contour folding brace).

  5. SIG Sauer - Wikipedia

    en.wikipedia.org/wiki/SIG_Sauer

    SIG Sauer is a Swiss brand name of firearms originally ... Cohen decided to add AR-15 style rifles to the company ... SIG Sauer M17; Compact size. P224; P225; P228 ...

  6. List of AR platform cartridges - Wikipedia

    en.wikipedia.org/wiki/List_of_AR_platform_cartridges

    The AR-15 rifle usually comes chambered for either the military cartridge 5.56×45mm or the .223 Remington. Because of the pressures associated with the 5.56×45mm, it is not advisable to fire 5.56×45mm rounds in an AR-15 marked as .223 Remington, since this can result in damage to the rifle or injury to the shooter. [ 1 ]

  7. XM250 - Wikipedia

    en.wikipedia.org/wiki/XM250

    The XM250's design is an offshoot of the MG 338 which SIG was also developing for SOCOM. [7] The XM250 light machine gun and XM7 rifle were designed to fire the 6.8×51mm SIG Fury cartridge in response to concerns that improvements in body armor would diminish the effectiveness of common battlefield rounds such as the 5.56×45mm NATO (used in ...

  8. .277 Fury - Wikipedia

    en.wikipedia.org/wiki/.277_Fury

    The .277 Fury or 6.8×51mm Common Cartridge [4] [5] (designated as the .277 SIG Fury by SAAMI) [1] is a centerfire rimless bottlenecked rifle cartridge announced by SIG Sauer in late 2019. [2] Its hybrid three-piece cartridge case has a steel case head and brass body connected by an aluminum locking washer to support the high chamber pressure ...

  9. List of firearms (S) - Wikipedia

    en.wikipedia.org/wiki/List_of_firearms_(S)

    SIG SG 553 R (Swiss Confederation - Compact Assault Rifle - 7.62×39mm) SIG SG 553 SB (Swiss Confederation - Compact Assault Rifle - 5.56×45mm NATO) SIG SG 553 SOW (Swiss Confederation - Compact Assault Rifle - 5.56×45mm NATO) SIG 522 (Federal Republic of Germany, Swiss Confederation - Semi-Automatic Rifle - .22 Long Rifle) SIG 522 Classic ...