The Kel-Tec RFB (Rifle, Forward-ejecting Bullpup) in .308 Winchester with 18-inch barrel is a bullpup semi-auto rifle that ejects spent cases forward through a tube above the barrel, again enabling ambidextrous shooting. The RFB delivers .308 Win power in an overall package shorter than an M4 carbine. It accepts FAL-pattern metric magazines. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: .308 Win Capacity: 20 Year introduced: 2008, USA Weight: 8.1 oz Overall length: 26.1" Status: Active Intended use: Tactical, Hunting, Home Defense