Overview
- The XM8 has been assigned a National Stock Number and appeared in industry materials, signaling preparation for soldier evaluations.
- Sig Sauer confirmed the carbine is about five inches shorter and roughly one pound lighter than the M7 and uses a fixed buttstock.
- The weapon retains the 6.8x51mm chambering; the shorter barrel reduces velocity, and reporting suggests accuracy improves with the carbine.
- Development stems from the M7 product-improvement effort shaped by soldier feedback, including weight concerns.
- The Army has not set adoption or quantity decisions, and the Marine Corps plans to keep its 5.56mm M27 rather than move to the NGSW rifles.