SIG SAUER SL MAG .338 Norma Magnum (NM) Lightweight Belt-Fed Machine Gun with Recoil Attenuation/Mitigation System and Lase-and-Engage Technology Electro-Optical Combat Optic/Laser Sight! (Video!)

Print Friendly, PDF & Email

By David Crane
david (at) defensereview (dot) com

January 28, 2019

Alright, DefenseReview’s back. Sorry for the delay in getting fresh articles up, but DR’s been on travel, and doing some moving. Now that we’re back, we’re devoting our first new piece to the SIG SAUER SL MAG .338 NM (Norma Magnum) lightweight belt-fed machine gun, since it’s definitely one of the most interesting and seemingly impressive new products we saw at SHOT Show 2019. And, assuming it can handle high round count full-auto without shooting itself apart, it’s going to be a winner. DR is of course curious as to how it compares to the General Dynamics GDATP .338 LWMMG (Lightweight Medium Machine Gun), which DR reviewed back in 2012 since the two guns will no doubt be competing directly against each other for military contracts around the world.

Editor’s Note: Your humble correspondent was probably one of the first civilians in the world to get to test fire the GDATP .338 LWMMG, and it was a pretty enjoyable experience. Unfortunately, we haven’t yet had a chance to do the same with the SiG SAUER SL MAG.

According to the SIG SAUER rep DR spoke with at SHOT, the SIG SAUER SL MAG .338 NM belt-fed machine gun apparently comes in at under 20 lbs, and is easy to shoot, thanks to its recoil attenuation/mitigation system. The SL MAG’s rate of fire (ROF) is applroximately 600 RPM (Rounds Per Minute). The gun’s also convertible by the operator (not just the armorer) to 7.62mm NATO (7.62x51mm NATO) within about 5 minutes. The SL MAG’s also optimized for suppressed fire, with three gas settings (Normal, Adverse, and Suppressed). The gun’s also fully ambidextrous with right and left-hand feed, and right and left-hand charging with quick conversion to either side. Pretty cool.

The SIG SAUER SL MAG also has a quick-change barrel (QCB) system, and fixed headspace and timing.

The SIG SAUER combat optic/laser sight shown in the photos and video is brand new. It sports a disturb reticle, ballistic calculator and laser, i.e., lase-and-engage technology for easy hits on (moving?) targets out to 1200 meters.

Company Contact Info:

18 Industrial Drive
Exeter, NH 03833
Phone: 603-772-2302
Fax: 603-772-9082
Law Enforcement Email:
Military/Govt. Email:

© Copyright 2019 (DR). All rights reserved. This material may not be published, broadcast, rewritten or redistributed without receiving permission and providing proper credit and appropriate links. If you are reading this article anywhere other than, please email us the website address/URL (where the unauthorized DR article reprint is located) at defrev (at) gmail (dot) com. Thank you.

All embedded (DR) photos and videos were shot with an Apple iPhone 6s Plus smartphone still/video camera.

Related Articles:

General Dynamics GDATP .338 NM LWMMG (.338 Norma Magnum Lightweight Medium Machine Gun) for Overmatch Capability: Potential Game-Changer for Mobile Infantry (Range Video!)

SIG MCX VIRTUS Patrol Semi-Auto-Only Tactical AR-15 Carbine May Just Be Important: Time (and Hands-On Testing and Evaluation) Will Tell

SIG MCX LVAW (Low-Visibility Assault Weapon) ‘Black Mamba’ Suppressed 300 Blackout (300BLK) Piston AR Assault SBR/PDW (Short Barreled Rifle/Personal Defense Weapon) Fired on Full-Auto and Semi-Auto with Subsonic and Supersonic Ammo During SIG SAUER New Media Writers’ Event (Video!)

SIG SAUER SIG MCX Piston AR Assault Rifle/Carbine/SBR/PDW and SIG MPX Submachine Gun (SMG)/PDW: Select-Fire, Multi-Caliber Weapons Explained at the SIG SAUER New Media Writers’ Event (Video!)

SIG MCX LVAW ‘Black Mamba’ 300 Blackout (300BLK) Piston AR SBR/PDW Features Demo: Subsonic/Supersonic Ammo Adjustment, Slimline Folding Stock, Tactical Handguard/Rail Removal (Video!)

SIG MPX Multi-Caliber KeyMod Machine Pistol/Submachine Gun (SMG) and Suppressed SIG MPX SMG/PDW (Personal Defense Weapon) Fired on Full-Auto and Semi-Auto at SIG SAUER New Media Writers’ Event (Video!)

SIG SAUER SIGTac SB15 Pistol Stabilizing Brace for One-Handed Firing of Tactical AR-15 Pistols

SIG SAUER SIG P320 Carry (P320C) Nitron Striker-Fired Compact Combat/Tactical Pistol and SIG P320 Full-Size (P320F) Nitron Pistol at the Range!: Shooting Impressions (Video!)

Tactical Revolution Rapid Barrel Change Rail System (RBCRS): Mount Your Laser Aimer/Laser Aiming Device on Machine Guns and other Crew-Served Weapons, and Keep that Laser Zeroed! (Video!)

Tactical Revolution AJAX Armor System Gun Armor: Lightweight Tactical Hard Armor Plate System Provides Instant Anti-Rifle Protection for Machine Gunners and Snipers! (Video!)

KAC Stoner LMG: Belt-Fed 5.56mm NATO Lightweight Light Machine Gun / Squad Automatic Weapon (LMG/SAW) Displayed at SOFIC 2010

DSG Technology/Mortars Inc. iMortar Ultra-Lightweight, Manpackable 60mm Mortar and Munitions Weapon System at SOFIC 2015 (Video!)

ARES Defense Systems ARES-16 MCR/AMG-2 (Mission-Configurable Rifle/Assault Machine Gun-2) Dual-Feed AR Machine Gun and ARES-16 MCR/AMG Mag-Fed SBR/Sub-Carbine for Military Special Operations Forces (SOF), Law Enforcement and Civilian Tactical Shooters (Video!)

Israel Weapon Industries IWI NEGEV NG7 LMG/LMG SF Belt-Fed 7.62mm NATO “Light Machine Gun”: Lightweight and Highly-Mobile Select-Fire 7.62x51mm Medium Machine Gun/General Purpose Machine Gun (MMG/GPMG) for Military Infantry Special Operations Forces (SOF) Missions in Urban Warfare Environments (Video!)

Valkyrie Armament Belt-Fed AR (AR-15) 5.56mm NATO/.223 Rem. Automatic Rifle/Carbine/SBR: Stoner 63 Modular Weapons System Revisited. Turn your select-fire/full-auto AR into a true light machine gun (LMG)/squad automatic weapon (SAW).

SIG SAUER SL MAG .338 Norma Magnum (NM) Lightweight Belt-Fed Machine Gun with Recoil Attenuation/Mitigation System and Lase-and-Engage Technology Electro-Optical Combat Optic/Laser Sight! (Video!) by

About David Crane

David Crane started publishing online in 2001. Since that time, governments, military organizations, Special Operators (i.e. professional trigger pullers), agencies, and civilian tactical shooters the world over have come to depend on Defense Review as the authoritative source of news and information on "the latest and greatest" in the field of military defense and tactical technology and hardware, including tactical firearms, ammunition, equipment, gear, and training.

Check Also

Ryker Grip: A ‘Patent-Pending, Biomechanically Optimized Shooting Method’ for Your Tactical AR-15 or AK Carbine/SBR

By Toby Melville March 25, 2024 From time to time, an individual assesses the status …