I used "CZ SCORPION EVO 3 S1" for the model on my form 1, if you are using a trust you need to check the box where it says "Corporation or Other Business Entity", and put the name of your trust and address. Also put your trust name in the box where it says "Trade name if any". You do not put your name on the form except where you sign the form, you sign it as a trustee. This is how i filled my form out and it took about 4 months to get approved with no problems. Oh also put "CZ-USA, UNITED STATES" for the name and location of the original manufacturer. The hardest part is the waiting game. Good luck!