The Kel-Tec RFB (Rifle, Forward-ejecting, Bullpup) Carbine is a unique bullpup-style rifle chambered in 7.62x51mm NATO/.308 Winchester caliber. Here are the specifications you provided:

• Model: Kel-Tec RFB Carbine
• Caliber: 7.62x51mm NATO/.308 Winchester
• Barrel Length: 18 inches
• Barrel Finish: Chrome-lined
• Stock: Black (presumably synthetic)
• Magazine Capacity: 20 rounds

The RFB Carbine is known for its forward-ejecting mechanism, which expels spent casings forward instead of to the side or rear, making it suitable for left-handed shooters and reducing the risk of ejected casings interfering with nearby shooters or optics.

The 18-inch chrome-lined barrel ensures durability and corrosion resistance while maintaining accuracy. The bullpup design allows for a shorter overall length without sacrificing barrel length, resulting in improved maneuverability in tight spaces.

The 20-round magazine capacity provides ample firepower for various shooting applications, including hunting, target shooting, and tactical use. The black synthetic stock offers durability and a modern appearance.

Overall, the Kel-Tec RFB Carbine in 7.62/.308 is a versatile and compact rifle suitable for a wide range of shooting tasks, from recreational shooting to hunting and self-defense.