ALBANY — The National Rifle Association has taken aim at New York, doling out more campaign donations in the Empire State over the last nine years than in any other in state in the nation.

The prime target: defeating Mayor Bloomberg’s push for microstamping of bullet casings, which backers say would be an effective crimefighting tool.

Since 2003, the NRA has reported giving New York legislators and political committees $217,400 — the organization’s largest outlay over that period.