An "Improved Frame" model was offered in 1854, presenting both a sleeker look and more comfortable grip. In that same year the British Board of Ordnance reviewed the Adams together with other percussion revolvers with a view to adopting one as an official service sidearm. Concerns about the gas escape between the cylinder and barrel during discharge resulted in no decision being made. Nevertheless, British officers purchased the Adams privately and the gun proved its worth in battle during the Crimean War.