The US Army's New Mk18? The Compact SIG SPEAR ASSAULTER K

Published on May 19, 2024
Duration: 29:22

The SIG SPEAR Assaulter K, a compact variant of the US Army's new M7 rifle, features a 9-inch barrel chambered in .277 Fury (6.8x51mm). Despite its short length, it achieves impressive velocities around 2,740 fps with a 113-grain projectile, significantly outperforming 5.56mm rounds. While the .277 Fury offers superior armor penetration and range, its 'concussive' recoil requires dedicated training. SIG Sauer's 'Rattler' gas trap technology ensures durability and a high Mean Rounds Between Stoppages (MRBS) of 10,000 rounds.

Quick Summary

The SIG SPEAR Assaulter K is a compact rifle featuring a 9-inch barrel chambered in .277 Fury (6.8x51mm). It achieves velocities around 2,740 fps, offering superior armor penetration and terminal ballistics. Its 'Rattler' gas trap technology ensures durability with a barrel life over 10,000 rounds.

Chapters

  1. 00:00Intro: SIG SPEAR Assaulter K
  2. 03:31Velocity & Chronograph Testing
  3. 05:26Recoil: .277 Fury vs. 5.56mm
  4. 09:51Ballistic Gel Testing
  5. 11:50SIG Sauer Tech Talk
  6. 18:24Reliability & Conclusion

Frequently Asked Questions

What are the key features of the SIG SPEAR Assaulter K?

The SIG SPEAR Assaulter K is a compact rifle with a 9-inch barrel, chambered in .277 Fury (6.8x51mm). It utilizes SIG Sauer's 'Rattler' gas trap technology for durability and boasts a Mean Rounds Between Stoppages (MRBS) of 10,000 rounds.

How does the .277 Fury round perform from the Assaulter K's 9-inch barrel?

Testing shows the .277 Fury achieves velocities around 2,740 fps with a 113-grain projectile, offering superior armor penetration and terminal ballistics compared to 5.56mm rounds from similar barrel lengths.

What is the recoil like with the SIG SPEAR Assaulter K?

The recoil from the .277 Fury cartridge is described as 'concussive' and 'violent' compared to 5.56mm. It requires more training to manage effectively, but the increased firepower is a significant advantage.

What is the expected barrel life of the SIG SPEAR Assaulter K?

Thanks to SIG Sauer's 'Rattler' gas trap technology, the Assaulter K is designed for durability despite the high-pressure cartridge. The barrel life is expected to exceed 10,000 rounds.

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