Hey everybody. Been waiting awhile to build my MKII semi auto Sten. Have some money to do it now. Have a semi auto tube coming next week from Indianapolis Ordinance. Have to wait till the semi auto Bolts come back in stock. Hopefully next month they said. First question I have is can you build a Pistol Sten and use a Pistol Grip and the short barrel without having the get SBR approval from the ATF. I spoke to them today. And they said it should not be a problem. That was only one agents input. Another could tell me differant I suppose. All I know is you can build a AR15 receiver as a pistol. And have a sub 16 inch barrel. But maybe the Sten is in a different ruling class? Any input appreciated there.. I would not mind submitting the Paperwork. But right now I would like to just use the pistol grip to get going. Indianapolis Ordinance said they cannot help with advice on a pistol grip and short barrel.. Funny, they sell them though,LOL Just want to make sure I do everything here correctly. Next question is, what do all the marking mean on my Sten Kit? Maybe someone can decipher them. I am sure as I build, I will have questions. I have a small Mill and Lathe. Hoping that is a little easier than using a drill press and Dremel. Thanks for any input.