The Z111 Factory (Vietnamese: Nhà máy Z111), formally registered as the 11 Precise Mechanical One Member Liability Company (Vietnamese: Công ty TNHH MTV Cơ khí chính xác 11, lit.

It is wholly owned by the Vietnamese Ministry of Defence, and the factory produces arms for the People's Army of Vietnam.

[2][6] They are known to be used by Vietnamese special forces personnel and officers from the Vietnam Coast Guard[7] due to its compact size.

[citation needed] An improved version of the K-54 pistol[a] is locally produced under the name of "K14-VN".

They are upgraded with an increased capacity of 13 rounds, and a wider grip to incorporate a double stack magazine.