.277 SIG FURY / 6.8x51 AR-10 Rifles | High-Performance Military & Precision Rifle

.277 SIG FURY / 6.8x51 AR-10 Rifles | High-Performance Military & Precision Rifle

Shop .277 SIG FURY rifles at Moriarti Armaments, including complete 6.8x51 AR-10 rifles built on the large-frame AR platform. Developed around a modern .277-caliber cartridge, .277 SIG FURY / 6.8x51 offers high-velocity performance from comparatively compact rifle configurations. Browse Moriarti rifles in multiple barrel lengths, handguards, stocks, muzzle configurations, and custom finishes. Compare available .277 SIG FURY rifles by barrel length, components, weight, finish, ammunition compatibility, and overall firearm configuration.

Is .277 SIG FURY the same as 6.8x51 NATO?

.277 SIG FURY and 6.8x51mm are closely related, but the names should not automatically be treated as interchangeable ammunition specifications. .277 SIG FURY is SIG Sauer's commercial cartridge, while 6.8x51mm is associated with the military's newer cartridge family. Ammunition specifications, pressure, case construction, and firearm ratings can differ. Always use ammunition specifically approved by the rifle manufacturer rather than assuming every .277 SIG FURY or 6.8x51 load is appropriate for a particular firearm.