“the right of the PEOPLE to keep and bear arms” is the crux of the 2nd amendment. It says that the PEOPLE need to keep the militia in check or the militia (i.e., army or government controlled force) will become a threat to freedom. The people cannot keep the the militia regulated without the individual arms (of similar type) to confront the army or militia with.
Assuming that you're being serious here, I will point out that the Militia, for the most part, IS the people, performing their role as an armed deterrent to tyranny.
When you say, "... the militia (i.e., army or government controlled force) will become a threat ...", you are implying that the army is the Militia. That is not so. The Militia were recognized as the means of preventing the necessity of having a standing army, which has frequently been the tool of tyrants.
You are confusing the militia, which is the people (technically all males ages 18-45,) with the “standing army” which is the government military. The militia should always be armed to keep any standing army in check, put down insurrection, or repel foreign invasion. Th Founders did not trust standing armies and believed in conscription to fight wars.