M7 rifle
| M7 | |
|---|---|
M7 U.S. Army 6.8mm rifle with the XM157 fire control optic | |
| Type | Assault rifle |
| Place of origin | United States |
| Service history | |
| In service | 2022–present |
| Used by | United States Army (trials only) |
| Production history | |
| Designed | 2019 |
| Manufacturer | SIG Sauer |
| Specifications | |
| Mass | 8.38 lb (3.80 kg) 9.84 lb (4.46 kg) (with suppressor) |
| Length | 36 in (914 mm) (with suppressor) |
| Barrel length | 13 in (330 mm) |
| Cartridge | 6.8×51mm (.277 in) |
| Action | Short-stroke gas-operated piston, rotating bolt |
| Muzzle velocity | 915 m/s (3,002 ft/s) |
| Feed system | 20-round detachable SR-25 pattern box magazine 25-round detachable SR-25 pattern box magazine (optional) |
The M7, previously designated as the XM5, is the U.S. Army variant of the SIG MCX Spear, a 6.8×51mm (.277 in), gas-operated, magazine-fed assault rifle designed by SIG Sauer for the Next Generation Squad Weapon program in 2022 to replace the M4 carbine.
The M7 features a free-floating reinforced M-LOK handguard for direct accessory attachment to slotted hole mounting points. It began being fielded in March 2024.