A true Small-Frame Autoloading Rifle, the SFAR is nearly identical in size to a traditional 5.56-caliber modern sporting rifle; Chambered in 7.62 NATO / .308 Win., the SFAR combines the ballistic advantages of .308 Winchester with the size of a traditional MSR; Bolt and barrel extensions are CNC-machined from high-strength super alloy steel that outperforms traditional C158 bolts; 4140 chrome-moly steel barrel is cold hammer-forged with ultra-precise 5R rifling; Ruger 2-port Boomer muzzle brake has large perpendicular surfaces to redirect gas and reduce felt recoil; 15″ aluminum handguard is free-floated for accuracy and features Magpul M-LOK accessory attachment slots along the 3:00, 6:00 and 9:00 positions and a full length Picatinny top rail; The rifle-length gas system features a 0.750″ 4-position rotary-regulator gas block to achieve ideal function across the wide range of ammunition available in the marketplace today; Equipped with a Ruger Elite 452 trigger that delivers a smooth, crisp 4.5-pound 2-stage trigger pull; Made from a 7075-T6 hard-coat anodized aluminum forging, the upper receiver is complete with brass deflector, forward assist, and full-length Picatinny rail; Comes with one, 20-round Magpul PMAG(R) magazine and is compatible with SR25(R)/AR-10(R)-pattern .308 Win/7.62 NATO magazines