The 16-inch coastal defense gun M1895 was a large artillery piece installed to defend major American seaports.

Only one was built and it was installed in Fort Grant on the Pacific side of the Panama Canal Zone.

Endicott found that America had fallen behind and that new naval technology made many forts and coastal defense weaponry obsolete.

The 1886 report recommended a $127-million ($4,307,000,000 in 2025) construction program of breech-loading cannons, mortars, floating batteries, and submarine mines for some 29 locations on the US coastline.

[1][3][4] The muzzle section was later preserved and displayed at the Watervliet Arsenal museum, which closed in 2013.