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  2. 6.8mm Remington SPC - Wikipedia

    en.wikipedia.org/wiki/6.8mm_Remington_SPC

    The 6.8mm Remington SPC was designed to perform better in short-barreled CQB rifles after diminished performance from the 5.56 NATO when the M16A4 was changed from the rifle configuration to the current M4 carbine. The 6.8 SPC delivers 44% more energy than the 5.56mm NATO (M4 configuration) at 100–300 m (330–980 ft).

  3. .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 ...

  4. 6.8 Western - Wikipedia

    en.wikipedia.org/wiki/6.8_Western

    The 6.8 Western is an adequate cartridge for hunting mid size big game species such as whitetail and mule deer up to considerable distances. Due to its high BC and sectional density it is also adequate for elk and even moose. The possibility of chambering this cartridge in short action rifles as well as its capability to resist cross winds ...

  5. XM7 rifle - Wikipedia

    en.wikipedia.org/wiki/XM7_rifle

    The XM7, previously known as the XM5, is the U.S. Army variant of the SIG MCX Spear, a 6.8×51mm (.277 in), gas-operated, magazine -fed assault rifle [ 1] designed by SIG Sauer for the Next Generation Squad Weapon Program in 2022 to replace the M4 carbine. The XM7 features a free-floating reinforced M-LOK handguard for direct accessory ...

  6. Next Generation Squad Weapon - Wikipedia

    en.wikipedia.org/wiki/Next_Generation_Squad_Weapon

    The Next Generation Squad Weapon ( NGSW) program is a United States military program created in 2017 by the U.S. Army to replace the 5.56mm M4 carbine, the M249 SAW light machine gun, and the 7.62mm M240 machine gun, with a common system of 6.8mm cartridges and to develop small arms fire-control systems for the new weapons. [ 1][ 2] Seven ...

  7. XM250 - Wikipedia

    en.wikipedia.org/wiki/XM250

    XM250. An officer from Fort Campbell fires an XM250. The XM250 is the U.S. military designation for the SIG LMG 6.8, a 6.8×51mm (.277 in), gas-operated, belt -fed light machine gun designed by SIG Sauer for the U.S. Army 's Next Generation Squad Weapon Program in 2022 to replace the M249 light machine gun. The XM250 light machine gun features ...

  8. List of AR platform cartridges - Wikipedia

    en.wikipedia.org/wiki/List_of_AR_platform_cartridges

    The rebated rim dimensions exactly match the 6.8mm Remington SPC case, allowing the use of the 6.8mm SPC bolt-face of an AR-15, but the case has a base diameter of .4400" and cannot be reformed from any other existing case. The 400 LGND uses .4005" jacketed rifle bullets. 450 Bushmaster, Uses .284 Winchester cases. Cut the length to 1.700" to ...

  9. Adaptive Combat Rifle - Wikipedia

    en.wikipedia.org/wiki/Adaptive_Combat_Rifle

    The Adaptive Combat Rifle ( ACR) is a modular assault rifle formerly designed by Magpul Industries of Austin, Texas, and known initially as the Masada . In late January 2008, Bushmaster Firearms International entered into a licensing agreement with Magpul whereby Bushmaster would take over production, future development, and sales of the Masada ...