The Springfield Armory Hellion is a bullpup semi-automatic rifle chambered in 5.56 NATO (5.56x45mm). It has an 18-inch threaded barrel, a 10-round capacity, and a black finish. The configuration includes low-profile flip-up sights. 
 

Key Specifications 

• Brand: Springfield Armory 
• Model: Hellion 
• Caliber: 5.56 NATO 
• Action: Semi Auto 
• Capacity: 10 rounds 
• Barrel Length: 18 inches 
• Color: Black 
   

Detailed Features 

• Bullpup layout with an 18-inch barrel in a compact overall package 
• Threaded barrel for muzzle device compatibility 
• Low-profile flip-up sights included 
• Semi-automatic operation in 5.56 NATO / 5.56x45mm 
• Black finish throughout

The Hellion attracts buyers who want a bullpup with a compact form and a domestic manufacturer's warranty. Springfield Armory's quality control is generally well-regarded, and owners of the Hellion report positive experiences out of the box. The 18-inch barrel gets praise for balancing velocity with the rifle's reduced overall length relative to a conventional layout.

Ergonomics are a dividing line. Shooters accustomed to traditional AR-pattern controls find the bullpup layout requires adjustment, particularly for magazine changes and controls placement. Left-handed shooters note the need to verify ejection clearance for their setup. The trigger, connected through a linkage as with all bullpup designs, draws the most mixed reviews; some find it acceptable, others would prefer an aftermarket replacement.

The Hellion sits in a price range where buyers compare it closely to AR-pattern alternatives. Those who want the bullpup form factor and a domestic brand tend to see the value clearly. Buyers not committed to the bullpup platform sometimes question whether the premium over a comparable AR build is justified given the trigger trade-off.