The Springfield Armory Hellion 5.56 NATO 18" redefines semi-automatic performance by adapting the battle-proven Croatian VHS-2 military architecture into a premier bullpup design. By positioning the action behind the trigger group, this platform retains a longer 18-inch hammer-forged barrel for enhanced downrange velocity while maintaining an ultra-compact footprint. It offers a fully ambidextrous interface complete with a non-reciprocating charging handle and a tool-less reversible case ejection system that lets left- and right-handed marksmen operate seamlessly from either shoulder. Cycling reliability is managed by an adjustable two-position short-stroke gas piston system tuned for both suppressed and normal operations, running in unison with premium low-profile integrated flip-up sights. Complete with a polymer M-LOK handguard, a BCMGUNFIGHTER Mod 3 grip, and a unique 5-position adjustable buttstock with a built-in cheek riser, this duty-ready rifle ships with a 30-round Magpul PMAG and a custom padded transport case.