Your argument fails intermediate scrutiny, which is the minimal level of scrutiny a constitutionally enumerated right must be held to. In brief, strict scrutin

Your argument fails intermediate scrutiny, which is the minimal level of scrutiny a constitutionally enumerated right must be held to. In brief, strict scrutiny is the most stringent level of scrutiny, and rational basis the least stringent. Operating a vehicle on public roads is decidedly a right, but not a constitutionally enumerated one, so it is only held to rational basis. Rational basis scrutiny allows a right to be curtailed it, on a rational level, the curtilage is related to a legitimate government interest. When strict scrutiny is applied, it means that a much more stringent justification must be met. Not only must it further a legitimate government interest, but it must also be the least restrictive possible means of doing so, and not fundamentally burden the right. Banning teflon coated bullets does not fundamentally infringe the right, and is narrowly tailored enough that it survives the least restrictive means test. Banning all ammunition cripples the right, fundamentally, and is nowhere near tailored enough to survive heightened levels of scrutiny.