Young Citizens & Guns

At 17-years young, I enlisted in our armed forces. Thereafter, I found myself in one of the US Navy's five/six most dangerous, enlisted grade, specialties. After my Honorable Discharge I served in dangerous (Paid and unpaid) civilian service directly towards the physical safety of my fellow Americans. Some of my age-peers (Who also entered our military services) had immediate access to fully automatic, true, assault rifles and even more dangerous weapons as had in the defense of all of us.(Did you or anti-gun Fascists so serve?)

At 79-years I am more than confused than is usual by the following.

1. Those 18-years of age are : Are able to vote; Manage their own financial and personal affairs; If males, are liable to The Draft; Are automatically liable to criminal prosecution (Some at earlier ages) if accused of crimes; And, can enter into and be held responsible-for civil contracts.

2. Yet, they and other citizens, under 21-years of age,are not allowed to purchase hand-guns or, were otherwise allowed, to obtain a permit/licence to carry concealed weapons.

3. Why do legislators, university officials and other officials AND judges fail to understand that the Founders of our Republic meant exactly what they stated when they included the "Shall Not Be Infringed" clause in the Second Amendment to our nation's Constitution?

4. From where is the constitutional authority for public authorities to limit and infringe-upon (Law abiding and legally presumed sane) citizens (***), under 21 and over 18-years old, their full rights under The Bill Of Rights to buy,keep and bear arms (eg On public university properties)?

*** Properly excluded from such rights are those who have been found, but only by a court-of-law and only after full "due process-of-law", who: To be felons who lose such rights for such periods-of-time as prescribed by laws; Those found mentally incompetent to manage their affairs; And, specially, those who have been found too dangerously mentally ill to "keep and bear arms".