General Dynamics Lightweight Medium Machine Gun

Lightweight Medium Machine Gun - .338 Norma Magnum

The General Dynamics Lightweight Medium Machine Gun is a prototype gas-operated open-bolt machine gun based on the recoil-mitigating technology developed for the cancelled XM806 and XM307 & XM312, wherein a large part of the gun's mechanism including the barrel and gas system reciprocates during firing and shots are timed to occur when the group is moving forward. It was developed based on experiences of US forces in Afghanistan around 2010, who were finding their M240s had issues with being outranged by insurgent forces using PKM machine guns, particularly when ambushed from high ground at extreme range where the 7.62mm NATO round drifts noticeably more than the 7.62x54mmR.

The .338 Norma Magnum is a Swedish-designed cartridge which fires a 300-grain projectile with over 4,600 foot-pounds of muzzle energy: it is four times more powerful than 7.62mm NATO at 1,000 yards (though on the downside both the rounds and belt links are twice as heavy), and more accurate at range than .50 BMG.

In May 2017, the United States Marine Corps and SOCOM issued a Sources Sought Solicitation for 5,000 machine guns chambered in .338 Norma Magnum. Since the LWMMG is the only machine gun that is currently chambered for this round, it is likely that the weapon will be adopted, with sources claiming that it is intended to supplement the Browning M2 and replace the M240 in these services.

Specifications

(Prototype, first displayed 2012)

• Type: General-purpose machine gun

• Caliber(s): .338 Norma Magnum

• Weight: 24 lbs (10.9 kg) (first prototypes), 22 lbs (10 kg) (current model)

• Length: 49 in (124.5 cm)

• Barrel length(s): 24 in (61 cm)

• Capacity: Belt-fed, usually 100 round belt box

• Fire Modes: Safe / semi / auto (500rpm)

---

The Browning M2 appears in the following movies, TV shows, and video games:

Video Games

Game Title	Appears as	Mods	Notation	Release Date
ArmA III	SPMG .338		Marksmen DLC	2013