take out all the commas except the one after "state"

They were rather freer with their commas back in the 18th century. They had rather more spare commas floating around than they did govenment money to buy guns with. And no standing armies to care for the guns anyway. Regarding the comma use, the main point of this thread given its existence in this forum, one could look at other, less controversial, sentences in the Constitution to get a feel for the style of the time.