Century Arms STORM CAT4 SpecificationsManufacturer: Century ArmsModel: STORM CAT4Caliber: 5.56 NATOAction: Semi-autoGun Platform: AR-styleHand: AmbidextrousCapacity: 30+1Barrel Length: 16"Barrel Material: Chrome moly vanadium, cold hammer forgedBarrel Finish: BlackBarrel Profile: ThreadedBarrel Twist: 1:7"Thread Pattern: 1/2x28Overall Length: 33.5"-36.8"Weight: 7 lb.Receiver Finish: Matte blackReceiver Features: Picatinny railHandguard: Mono-Loc, M-LOKTrigger: Hiperfire EDTSafety: AmbidextrousStock: Magpul DT carbine, adjustableStock Material: PolymerStock Finish: BlackGrip: US Palm reduced angleMuzzle Device: US Palm Hurricane flash hider/compensatorSights: NoneIncludes: 1 30-round magazine