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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.
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 .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 ...
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).
SIG Sauer: SIG MCX SPEAR rifle and SIG LMG 6.8 belt-fed machine gun with custom 6.8×51 SIG FURY brass-steel hybrid cartridges. Down-selected but rejected: Three manufacturers were down-selected for the final phase of testing, including the ultimately selected SIG Sauer; the other two selected were: [14]
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 ...
NGSW-R (Next Generation Squad Weapon - Rifle) (6.8 Common Cartridge) -- Sig Sauer MCX Spear rifle and cartridge selected and ordered by US Army as the XM7 rifle and 6.8 Common Cartridge. MRGG-A (Mid-Range Gas Gun - Assaulter) (6.5mm Creedmoor) Mk 17 Mod 1 (FN SCAR-H) (6.5mm Creedmoor) LMT MARS-H 6.5 DMR (6.5mm Creedmoor)
Textron submitted a cased-telescoped (CT) ammunition-firing rifle for the program; FN Herstal submitted their HAMR IAR re-chambered in 6.8mm caliber; PCP Tactical submitted a modified Desert Tech MDRx; SIG Sauer submitted a redesigned MCX variant known as the MCX-SPEAR. In early 2022, the program concluded, with SIG Sauer being declared the winner.