The Springfield Armory Hellion 5.56 NATO 20" CA Compliant allows Golden State firearms enthusiasts to experience the elite performance of battle-proven military architecture while remaining fully legal under state regulations. Built around a highly efficient two-position short-stroke gas piston system, this bullpup positions its action behind the trigger group to provide a velocity-optimized 20-inch barrel within an incredibly compact profile. To ensure full California compliance, the factory outfits this featureless variant with a pinned, fixed-position stock, a Strike Industries featureless fin grip, and an SA muzzle brake in place of the standard flash hider. Operation remains thoroughly versatile thanks to fully ambidextrous safety controls, a non-reciprocating charging handle, a tool-less reversible case ejection configuration, and built-in pop-up iron sights integrated directly into the top Picatinny rail. The rifle is rounded out with a premium polymer M-LOK handguard for accessory attachments, a 10-round Magpul PMAG, and a heavy-duty padded soft case.