Sig MCX Spear - US Army NGSW - Disassembly, Live Fire & Discussion

Published on May 27, 2022
Duration: 22:25

This guide details the field stripping procedure for the Sig MCX Spear, a civilian variant of the US Army's NGSW. It covers separating the upper and lower receivers, removing the recoil spring and BCG, and disassembling the bolt. The process is similar to an AR-15, emphasizing safety and the unique features of the Spear.

Quick Summary

The Sig MCX Spear, a civilian version of the US Army's NGSW, is chambered in .277 Fury (6.8x51mm) and features a short-stroke gas piston system. Its hybrid cartridge handles 80,000 PSI, and it utilizes a 3D printed flow-through suppressor to minimize gas blowback.

Chapters

  1. 00:00Introduction to the Sig MCX Spear
  2. 01:40Ammunition Technology: .277 Fury
  3. 04:103D Printed Suppressor Technology
  4. 05:52Field Stripping and Internal Mechanics
  5. 08:50Bolt and Lower Receiver Features
  6. 12:08Live Fire: Full Auto and Suppressor Performance
  7. 15:44Final Assessment and Military Role

Frequently Asked Questions

What is the Sig MCX Spear and its significance?

The Sig MCX Spear is the civilian variant of the US Army's Next Generation Squad Weapon (NGSW), chambered in the high-pressure .277 Fury (6.8x51mm) caliber. It represents a significant advancement in military small arms technology, designed for enhanced range and armor penetration.

How does the .277 Fury cartridge differ from traditional rifle rounds?

The .277 Fury (6.8x51mm) uses a hybrid case with a steel base and brass body to withstand extreme operating pressures of 80,000 PSI. This allows for high projectile velocities, offering superior ballistic performance and armor-defeating capabilities compared to rounds like 5.56mm NATO.

What are the key features of the Sig MCX Spear's suppressor system?

The MCX Spear can be equipped with a 3D printed flow-through suppressor. This advanced design vents gases forward through internal baffles, significantly reducing gas blowback to the shooter's face and keeping the firearm's action cleaner during sustained fire.

What is the field stripping process for the Sig MCX Spear?

Field stripping involves removing two takedown pins to separate the upper and lower receivers. The recoil spring assembly and bolt carrier group (BCG) are then removed from the upper receiver. The bolt can be further disassembled from the BCG.

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