The FN M249S (FN part no. 46100169) is a semi-automatic rifle chambered in 5.56x45mm NATO, built as the civilian-legal version of the belt-fed squad automatic weapon FN America supplies to militaries worldwide. This black-finished M249S pairs an 18.5-inch barrel with a dual-feed system that runs from either a detachable box magazine or a 200-round disintegrating belt, giving shooters the flexibility of a standard rifle with the heritage of a genuine SAW platform. It is a rifle built for collectors and shooters who want the real M249 experience without giving up semi-automatic-only reliability. Few rifles turn heads at the range the way this one does.

Key Specifications

• Chambered in .223 Rem/5.56 NATO, a widely available and versatile cartridge.
• Features an 18.5-inch barrel matched to the M249 platform’s gas system.
• A 1:7-inch twist rate stabilizes a wide range of 5.56 bullet weights.
• Overall length runs approximately 41 inches.
• Unloaded weight is approximately 17 pounds.
• Can run from a detachable box magazine or be belt-fed, giving shooters two ways to load the gun.
• Ships with one 30-round GI magazine and 200 rounds of disintegrating belt link with box.
• Equipped with adjustable sights for zeroing to the shooter’s preference.
• A crossbolt safety gives fast, positive on/off control.
• Finished in black for a rugged, mil-spec look.

Frequently Asked Questions

Can the FN M249S run belt-fed? Yes, it will take detachable box magazines or run belt-fed from 200-round disintegrating belt links.

What comes included with the M249S? It ships with one 30-round GI magazine and 200 rounds of disintegrating belt link with box.

What safety does it use? A crossbolt safety provides quick, positive control.

Buy the FN M249S 5.56mm Semi-Auto SAW Rifle

Own a genuine piece of modern military firearms heritage with this semi-automatic FN M249S. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and add one of the most recognizable platforms in our semi-auto rifles lineup.