How POWERFUL Is The Military’s NEW Rifle ???

Published on March 16, 2026
Duration: 18:32

Scott from Kentucky Ballistics tests the Sig MCX Spear, the civilian version of the military's new M7 rifle, chambered in the powerful 277 Fury (6.8x51mm) cartridge. The video focuses on the cartridge's performance, testing its penetration against ballistic glass, Level IV body armor, and an armored truck, alongside ballistic gel and dairy product tests. The 277 Fury demonstrates significantly higher pressure and energy transfer compared to 5.56 NATO.

Quick Summary

The military's new rifle cartridge is the 277 Fury (6.8x51mm), operating at approximately 80,000 PSI, significantly higher than 5.56 NATO. It can propel a 135-grain bullet over 3,000 ft/s and demonstrates impressive penetration against ballistic glass, body armor, and armored trucks.

Frequently Asked Questions

What is the military's new rifle cartridge?

The military's new primary rifle cartridge is the 277 Fury, also known as 6.8x51mm. It is designed to operate at significantly higher pressures than previous cartridges like 5.56 NATO, delivering more energy and penetration.

How does the 277 Fury compare to 5.56 NATO in terms of pressure?

The 277 Fury cartridge operates at approximately 80,000 PSI, which is considerably higher than the 62,000 PSI of the 5.56 NATO cartridge. This higher pressure allows it to propel heavier bullets at high velocities.

What kind of performance can be expected from the 277 Fury cartridge?

The 277 Fury can propel a 135-grain bullet upwards of 3,000 feet per second. Tests show it can cause significant damage to ballistic glass, penetrate Level IV body armor (though not fully through), and pierce an armored truck.

What rifle is associated with the 277 Fury cartridge?

The Sig MCX Spear is the civilian version of the military's new M7 rifle, which is chambered in the 277 Fury cartridge. The MCX Spear features both rear and side charging handles.

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