The Springfield Armory Hellion is a 5.56 NATO bullpup semi-automatic rifle with an 18-inch barrel. It has a bullpup stock and ships in black with a 30+1 round capacity. 
 

Key Specifications 

• Brand: Springfield Armory 
• Model: Hellion 
• Caliber: 5.56 NATO 
• Action: Semi Auto 
• Capacity: 30+1 rounds 
• Barrel Length: 18 in 
• Color/Finish: Black 
   

Detailed Features 

• 18-inch barrel in a bullpup configuration 
• Bullpup stock 
• 30+1 round capacity 
• Semi-automatic action in 5.56 NATO

Owners who choose the 18-inch Hellion over the 16-inch variant generally cite the barrel length as a factor for long-range accuracy and velocity, while the bullpup configuration keeps the overall package reasonably compact for the barrel length.

The Hellion platform ambidextrous controls and adjustable stock draw consistent positive feedback across the line. The forward ejection design is frequently cited by left-handed shooters as a key reason they chose the Hellion over traditional layouts.

Build quality perceptions are generally positive, though some owners note the overall weight of the 18-inch configuration as a trade-off compared to shorter options. Gear Up package buyers appreciate the included accessories, while base model buyers find the rifle ready to run after adding preferred optics.