How exactly did the shooter get down from the sixth floor?

[Royell Storing]

  MASON - I have proven via Image Evidence that those Huge Gates were Open/Ajar. (Towner Film & Couch Film Reverse Negative). This means at least 1 Man on those Huge Gates during the shots being fired. Probably also a Spotter + The Shooter on the TSBD 6th Floor. And then comes Oswald cooling his heels inside the 2nd Floor Lunchroom. This means 4 guys minimum. This was a well planned operation, with Oswald being the "inside man". Oswald knew the TSBD connected to the Huge Gates, and he knew about that 2nd Floor window being right next to the stairwell, leading to the roof top. Oswald collecting book orders up and down the 6 floors of the TSBD, means he would have known every nook-n-cranny inside and outside of that building. 

[John Iacoletti]

Oswald's alibi was that at the time of the assassination, he was in the Lunch room.
The following report says that during the time Oswald claimed that he ate his lunch, two negro employees walked through the room.
And outside of the lunch room on the first floor was as you say was the shipping area, which as your terminology rightfully points out is not a room.

Of course it's a room.

Norman and Junior got in the elevator and went straight from the first floor to the fifth floor, which rules out any encounter on the 2nd floor and the lunchroom there.

Who said anything about the second floor?

Oswald also told Fritz that he ate lunch with Junior. Bzzzzztt, wrong!

Fritz, Kelly, and Bookhout are all talking about the same interrogation session.  You don't know which account (if any) is accurate.

[John Iacoletti]

For example Oswald reached for his revolver(which BTW was the same revolver that killed Tippit and a reason they were there)

LOL

and according to McDonald, Oswald was drawing it, but erroneously you argued that carrying a concealed weapon wasn't a crime

I didn't argue that.  Speaking of quoting people incorrectly.

(it actually was according to Belin) and that basically you implied that the Police should have let Oswald draw his revolver out into the open and kill them all!

What you want to pretend I "implied" is irrelevant.