The Radical Firearms RF10 RBR10-308-20 is a semi-automatic rifle chambered in .308 Winchester with a 20-inch stainless steel barrel. At 12.4 lbs it's on the heavier end, but the .308 caliber and 20-inch barrel give it real reach for hunting and long-range work. 
 

Key Specifications: 

• Caliber: .308 WIN 
• Capacity: 20+1 ROUNDS 
• Barrel Length: 20" 
• Weight: 12.4 LBS 
• Action Type: Semi-Auto 
• Finish Color: Black 
• Safety Mechanism: Thumb Safety 
• Trigger Type: Standard Trigger 
• Grip Type: Standard Grip 
• Stock Type: 6 Position B5 Bravo Adjustable Stock 
• Sights: Optic Ready 
• Barrel Twist Rate: 1:10" 
   

Detailed Features: 

1. Direct Impingement Gas System: Reliable cycling with reduced recoil and faster follow-up shots. 
2. Optic Ready Design: MIL-Std 1913 Picatinny rail on top of the receiver for scope or other optic mounting. 
3. Billet Aluminum Construction: Upper and lower receivers are 7075-T6 billet aluminum -- strong without adding unnecessary weight. 
4. Adjustable Stock: MFT Minimalist Stock with six positions to fit different shooter sizes. 
5. Threaded Barrel: 5/8x24 TPI threading with the RF-MS Compensator to reduce muzzle rise. 
    

Usage Scenarios: 

1. Hunting: The .308 caliber handles larger game well across varied terrain. 
2. Competitive Shooting: The 20-inch barrel and optic-ready setup suit timed and long-range competitions. 
3. Home Defense: Semi-auto action and 20+1 capacity give it defensive utility at the cost of size and weight.

The Radical RF10 in .308 Win gets a generally favorable reception, though a few issues come up consistently.

On the positive side, users are satisfied with its accuracy at range. The 20-inch barrel and 1:10 twist perform well for both target shooting and hunting, and the semi-auto action cycles smoothly under normal conditions. The adjustable stock and customizable layout draw regular positive comments from owners who want to dial in fit.

The main criticisms are weight and reliability. At 12.4 lbs, some hunters find it tiring on long carries. Reliability concerns show up in discussions around ammunition sensitivity -- a handful of owners report cycling issues with certain loads or in wet conditions. Opinions on value are split: some see it as competitive pricing for a .308 semi-auto, while others point to comparable options in the same price range.

For range use or hunting from a fixed position, the RF10 holds up well. It's less appealing as a carry rifle.