From the Oregon Firearms Federation:
Please consider making a donation to OFFPAC. As a political action committee, OFFPAC can offer you an amazing deal. You can make a donation to help Oregon Firearms Federation elect good candidates and stop the bad ones and actually reduce your Oregon tax bill at the same time!
That's because donations to PACs qualify for tax credits under Oregon's tax rules. Please note, this is not a tax "deduction", it's far better.