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.
An approved Form 1 is required to convert the CZ Scorpion EVO 3 S1 Pistol into an SBR. The ATF has informed CZ-USA that 922r does apply, and their official parts count for the Scorpion Pistol is 16 parts. CZ-USA is manufacturing a number of US-made parts which are included in this kit to ensure that individuals manufacturing SBRs have the means to comply with 922r.