Finally available for public consumption is the much anticipated Scorpion sub-gun. Imported as a pistol, it is a blowback-operated semi-auto in 9mm with a short 7 barrel. Equipped with our newly designed low-profile sights, its rear sight has four different aperture sizes for everything from close quarters to way out there. The sights ride on an 11 Picatinny rail perfect for mounting optics. Starting in 2016, Scorpion Pistols feature 1/228 threads hidden underneath the factory flash-hider, meaning users can fit either 1/228 or 181 accessories to the muzzle. Also added is a QD sling swivel pocket integrated into the rear sling attachment point. Simple and reliable, the Scorpion not only has ambidextrous controls, its non-reciprocating charging handle is swappable and reach to the trigger is adjustable. The CZ Scorpion EVO 3 S1 Pistol is legally classified by the ATF as a pistol , and is intended by CZ-USA to be used as a pistol. Under current federal law and ATF policy attaching a stock to this pistol or attaching a device which is then used as a stock or intended to be used as a stock constitutes the making of a short-barreled rifle which requires registration with ATF and the payment of the applicable tax. Users of the CZ Scorpion EVO 3 S1 Pistol bear the sole responsibility for ensuring their use of the firearm complies with all local, state, and federal firearms laws.