Technology

Army to Deploy New M8 Carbine After Rapid Redesign of M7

By Aryan Singh

The U.S. Army will begin fielding the M8 carbine in December, following a rapid redesign of its Next Generation Squad Weapon system. The M8, formerly designated the XM8, is a shorter and lighter variant of the M7 that was introduced as a major upgrade over the M4. Soldiers reported that the M7’s weight—over 8 lb (3.6 kg) unloaded and nearly 10 lb (4.5 kg) with a suppressor—was significantly heavier than the M4A1 and that its length and handling were problematic when carried with other combat equipment. The M8 addresses those concerns by being more than 1 lb (0.45 kg) lighter and 3.5 in (8.9 cm) shorter than the M7 while retaining the 6.8×51 mm ammunition and compatibility with the M157 fire‑control system. The Army’s fiscal 2027 budget request seeks 14,944 M8 carbines and no additional M7 rifles, even though roughly 50,000 M7s have already been delivered. The M8 features a fixed stock, a redesigned handguard, and a free‑floating M‑LOK handguard that allows accessories to be mounted without contacting the barrel. It is a modular, piston‑driven, select‑fire, magazine‑fed rifle designed to give close‑combat troops greater mobility while maintaining the lethality of the 6.8 mm cartridge. The M8 weighs 7.3 lb (3.3 kg) empty and 8.8 lb (4 kg) with a suppressor and heat shield. The M157 Small Arms Fire Control system, which the M8 retains compatibility with, weighs 2.67 lb (1.21 kg) and offers 1–8× magnification, a laser rangefinder, ballistic calculator, atmospheric sensors, compass, visible and infrared aiming lasers, and a digital display overlay. The system is designed to provide soldiers with a calculated ballistic solution and corrected point of aim for engagements beyond 600 m.