The 12 Pounder Rifled Breech-Loading Gun is a heritage-listed weapon at 72 End Street, Deniliquin, Edward River Council, New South Wales, Australia. It was designed by Sir William Armstrong and built from 1855 to 1864. It is also known as 12 Pounder Rifled Breech-Loading Gun (Armstrong) (moveable heritage item), 12 Pdr RBL and 12 Pdr Armstrong. It was added to the New South Wales State Heritage Register on 15 April 2016.