A total of five ships of this type are being built in Zelenodolsk for the Russian Navy. The contract for the construction of the lead small rocket ship of the 21631 project (the future Grada Sviyazhsk) was signed by OAO Zelenodolsk Shipbuilding Plant named after AM Gorky with the Russian Ministry of Defense 28 in May 2010. In addition to Grad Sviyazhsk, the company currently has four other ordered ships, Uglich (building number 632, laid 22 on July 2011 of the year, launched 10 on April 2013,), Veliky Ustyug (building number 633, laid 27 August 2011 of the year), "Green Dol" (building number 634, laid 29 August 2012 of the year) and "Serpukhov" (building number 635, laid 25 January 2013 of the year).
The head small rocket ship of the 21631 project "Grad Sviyazhsk" in afloat is building up at the Zelenodolsk Shipbuilding Plant named after A.M. Gorky. Zelenodolsk, May 2013 of the year