XM8 Lightweight Modular Weapon System
| Calibre | 5.56 x 45mm NATO |
| Weight | 6.4 lbs (prototype) 5.7 lbs objective |
| Overall Length | 33.0 inches (carbgine stock extended) |
| Barrel length | Assault: 12.5" Sharpshooter: 20.0" Compact: 9.0" Austomatic rifle: 20.0" |
| Rate of twist | 1 in 7 inches |
| Rate of Fire | Cyclic - 750 rpm Sustained - 85 rpm up to 210 rounds |
| Barrel length | 20,000 rounds minimum |
| Muzzle Velocity (MBSS Ball) | 2850 feet/second with 20" barrel 2545 feet/second with 12.5" barrel 2240 feet/second with 9.0" barrel |
| Magazine capacity | 10 or 30 round (magazines can be nested together), 100 round drum available. |
| Stock | 5 position adjustable for length |
| Bayonet Lug | Yes (12.5 & 20" barrels) |
| Bipod Interface | Yes (20° only) |
Sighting System |
Fully integrated red dot with laser illuminator and pointer.
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