For starters, the new law includes no requirement that existing guns be registered with the state. In fact, people who legally own handguns, assault weapons or any other kind of gun — and those who at least order them before the law goes into effect in October — will not be affected by this bill at all. Maryland has for 20 years prohibited machine pistols, which apparently was not an affront to the commissioners' Second Amendment sensibilities. Maryland already restricts the size of ammunition magazines — presently, the limit is 20 rounds, and once the new law goes into effect, it will be 10. And the new licensing regimen for handgun buyers differs from current law principally in the requirement that buyers provide their fingerprints as part of the application.