[Hectic]

Okay so me thinks ima finally jump on the GBBR wagon seeing as its getting warmer out and whatnot.
So what all do i need. I was hoping to get a 416 but ill likely go withthe cqbr and add a silencer to hide a longer barrel down the road.
So i know i should get an npas but can i get away without it for now untill it starts getting warmer? (reason is id rather just buy the ratech aluminium nozzle and steel bolt with the npas on it alrdy but wont have the cash right away to grab it after gettin the rifle and 10 mags or so)
So will i be able to stay around 400 (or less as it says 370fps) in moderate tempratures?
And what else do i need? A hop up rubber i spose? Do i need a whole hop unit or just the rubber?.
All those steel parts (sears and other trigger bits and such) are those needed out of the box or just run it till something breaks?
Thanks for the info.