The Kel-Tec RFB Carbine is a semi-automatic bullpup chambered in .308 Win (7.62mm NATO). The bullpup layout puts the action behind the trigger, giving you an 18-inch barrel in a 26-inch overall package — nearly a foot shorter than a conventional rifle with the same barrel length. It weighs 8 lbs. unloaded and uses FN FAL magazines for 20+1 capacity. 
 

Key Specifications 

• Manufacturer: Kel-Tec 
• Model: RFB Carbine 
• Caliber: .308 Win (7.62mm NATO) 
• Barrel Length: 18" 
• Overall Length: 26" 
• Weight: 8 lbs (unloaded) 
• Capacity: 20+1 rounds (uses FN FAL magazines) 
• Action Type: Semi-Automatic 
• Condition: New in Box 
• Finish Color: Black 
   

Detailed Features 

The 4140 steel receiver has a Parkerized finish for corrosion resistance. The synthetic stock keeps weight down. The Picatinny rail runs along the top — no iron sights are included, so you'll need to add your preferred optic. Dual-action safety mechanisms are present. The magazine-forward-ejection system ejects brass forward rather than to the side, which eliminates brass-in-face issues common to other bullpup designs. 
 

Target Audience 

Firearms enthusiasts who want a compact .308 platform — hunters who need to move through thick cover, home defenders who want a full-power rifle cartridge in a shorter package, and competitive shooters interested in bullpup design. 
 

Usage Scenarios 

The 18-inch barrel and .308 Win caliber make it capable for medium-to-large game hunting and defensive use. The compact overall length is a real advantage in vehicles, confined spaces, and dense terrain. Optics are required since no sights are included.

The Kel-Tec RFB draws a vocal community with clear splits in experience.

The bullpup configuration is the most consistently praised feature. Getting an 18-inch barrel into a 26-inch overall length is a genuine practical advantage, and .308 Win capability at that size is uncommon. The forward brass ejection design also draws specific praise — it's one of the few bullpups that doesn't throw cases past your face.

Reliability is where opinions diverge. Some owners report no issues across many rounds; others hit feeding and ejection problems, particularly with specific ammunition types. This is a recurring theme specific to the RFB and worth taking seriously before purchase. Testing with your intended ammo is essential.

Weight distribution gets mixed reviews. The bullpup layout shifts balance rearward, which some shooters adapt to quickly and others find awkward over extended sessions.

The price point compared to other .308 bullpups is frequently cited as a positive. Aftermarket support and customization options generate interest, though availability can be inconsistent.

Aesthetics divide opinion — the RFB's industrial look has a following, and plenty of shooters prefer traditional stock designs. Overall: a genuinely interesting platform with real practical advantages, but the reliability variability means doing your research before committing.