The RFB (Rifle, Forward-ejection, Bullpup) is a gas-operated semi-automatic rifle with a tilting breechblock locking mechanism, manufactured by Kel-Tec Industries of Florida.
Available since March in 7.62x51mm NATO (.308 Winchester)
Uses FAL detachable box magazines

[link to upload.wikimedia.org]

Kel-Tec is preparing smaller versions of the same design, adapted to 'intermediate' calibers such as 7.62x39, 5.56x45mm NATO (.223), 6.5 Grendel and 6.8mm Remington SPC

[link to en.wikipedia.org]
>Bullpup is a firearm configuration in which the action and magazine are located behind the trigger. This increases the barrel length relative to the overall weapon length, permitting shorter weapons for the same barrel length, saving weight and increasing maneuverability. It alternatively allows for longer barrels on weapons of the same length, which can increase muzzle velocity. Higher muzzle velocities result in flatter trajectories, a longer effective range, and, in some cases, increased lethality.<

YouTube - RFB CARBINE 308 bullpup rifle from kel-tec