The concepts continued to be tested under the Future Rifle Program and again in the 1980s and 1990s under the Advanced Combat Rifle program, but neither program resulted in a system useful enough to warrant replacing the current M16.
Konsep terus diuji di bawah Program Future Rifle dan lagi pada 1980-an dan 1990-an di bawah program Advanced Combat Rifle, tetapi program tidak menghasilkan sistem yang cukup berguna untuk menjamin dan menggantikan M16 saat ini.