The HK416 Pistol configuration features a 9-inch barrel without a stock, classified as a pistol under US ATF regulations. Functionally a compact HK416 in legal pistol form, it uses a pistol buffer tube and accepts brace attachments. Popular with civilian buyers who want the HK416 piston system in a compact form without an NFA SBR registration. Type: Semi-Auto Pistol Action: Short-Stroke Gas Piston Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2017, Germany Weight: 6.5 oz Overall length: 28.5" Status: Active Intended use: Sport Shooting, Home Defense