Are they pistols? And what happens next

Yes, they are pistils. Since you are growing autos, there is no need to change the light cycle, 18 hours light and 6 hours of dark is optimal. You can continue with LST until the plant has small "tufts" of white pistils developing at the ends of the branches, which will be 2-3 weeks from the appearance of the first pre-flowers (primordia). I would suggest continuing with your "grow" nutrients until the first "tufts" have developed. Cannabis still needs nitrogen in larger amounts at flower initiation. I then, personally, like to give a mix of half "grow" nutrients and half "bloom" nutrients for the next 2 weeks or so, depending on the rate of flower development, before finally changing to pure "bloom" nutrients. The slower the plant flowers grow, the longer I will continue with the half/half nutrients, the faster the flowers grow, the sooner I switch to pure "bloom" nutrients. Since you are growing Speed+ Auto by Sweet seeds - (my favourite breeder by the way, good value, excellent genetics, easy to grow potent plants!) - I would suggest 2 weeks more with the "grow" nutrients, 2 weeks with the half/half mix and then pure bloom nutrients until 10-14 days before expected harvest, giving just plain water for the last 10-14 days, so as to "flush" your plants. Hope this helps and good luck! ,........ Organoman.