Inside Look: SIG Sauer MG 338 Machine Gun

by
posted on January 22, 2020
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
Ahead of SHOT Show 2020, SIG Sauer provided an in-depth look at the company's revolutionary new MG 338 machine gun, designed for U.S. Military use.

The SIG MG 338 is designed particularly to provide a platform that, in effect, splits the difference between the U.S. M240 machine gun and the .50-caliber M2 Browning. Compared to the current M240 (7.62 NATO) machine gun, the SIG MG 338 is noticeably lighter, weighing only 20 pounds, and is designed to provide enhanced capability over the 7.62 NATO M240.

In comparison to the M2, which has been in U.S. military service for nearly a century, the MG 338 is about 75 percent lighter, offering a man-portable solution with a similar effective-range to the .50 BMG. The guns are also outfitted with SIG Sauer Next Generation Suppressors, which drastically reduce the impact of harmful toxic fumes and signature. The SIG Sauer MG 338 machine gun is a belt-fed, lightweight medium machine gun weighing under 20 lbs., chambered in .338 Norma Mag.

The MG 338 features a short-stroke gas piston system and a proprietary recoil mitigation system, with a free-floating, quick-change barrel, ambidextrous controls, switchable feed tray, charging handle that can be alternated to either side, depending on user preference. As a multi-caliber, modular system, the new SIG MG 338 is easily convertible to 7.62 NATO.

For more information on the MG 338, check out our American Rifleman First Look video above.

Latest

Hk Cc9 GOTW 1
Hk Cc9 GOTW 1

Gun of the Week: Heckler & Koch CC9

The Heckler & Koch CC9 isn't merely just another micro-compact. It's the result of a significant amount of work on the part of the company's US subsidiary to create the first truly American-made HK.

The Armed Citizen® May 22, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Political Report | Braced Pistols’ Status Unresolved

The U.S. Supreme Court has characterized handguns as the “quintessential” Second Amendment arm. Pistol braces increase accuracy and ease of operation for large-format handguns, especially for users suffering from physical disabilities.

The PROOF Research PXT: A New Approach to Barrel Rifling

PROOF Research has introduced PROOF eXponential Twist (PXT)—an advancement in rifling that improves durability, accuracy and shootability—to the commercial market.

Review: Springfield Armory Model 2020 Heatseeker

Back when American Rifleman reviewed Springfield's Model 2020 Waypoint, we noted that we ...couldn’t help but wonder if a tactical-version Model 2020 rifle might be a logical future offshoot of the Waypoint hunting rifle." With the Model 2020 Heatseeker, that version is finally here.

Marlin Goes Mad: The Marlin Mad Pig Customs Model 1894

Marlin’s latest Model 1894 lever-action rifle, a collaboration with Mad Pig Customs that is a far cry from traditional, delivers “modern, factory‑installed features previously found only on custom builds.”

Interests



Get the best of American Rifleman delivered to your inbox.