The Ruger SFAR is nearly identical in size to a traditional 5.56-caliber modern sporting rifle. Made from a hard-coat anodized 7075-T6 aluminum, the upper receiver is complete with a brass deflector, forward assist, and full-length Picatinny rail. The lower receiver features a generous flare on the magazine well for easy magazine insertion. Venting holes in the upper receiver, barrel extension and bolt carrier ensure that excess gas is directed safely away from the user. Chambered in 7.62 NATO / .308 Win, the SFAR combines the ballistic advantages of .308 Winchester with the size of a traditional MSR. With a 15" Lite aluminum free-floated handguard and three-position M-Lok accessory slots, the top rail has also been docked in the center for improved grip and reduced weight, while still offering Picatinny rail sections at the front and rear. Sockets for Quick Detach sling swivels located at the muzzle end of the handguard allows for comfortable carry with a two-point sling.

The bolt and barrel extensions are CNC-machined from high-strength super alloy steel that outperforms traditional C158 bolts. The SFAR is compatible with most Mil-Spec MSR Trigger groups, receiver end plates, charging handles, pistol grips, and adjustable stocks. This rifle is equipped with a Ruger Elite 452 trigger that delivers a smooth, crisp 4.5 pound, 2-stage trigger pull, along with a full-strength hammer spring and lightweight hammer to ensure fast lock times and consistent primer ignition.