Complex sentence: On 22 February, 2015 Raytheon announced a development of Extended Range upgrade to the NASAMS AMRAAM missile (AMRAAM-ER), making the missile "even faster and more maneuverable than the current AMRAAM".
Split into simpler sentences: On 22 February, 2015 Raytheon announced the development of the Extended Range upgrade to the NASAMS AMRAAM missile offering (AMRAAM-ER). The upgrade is expected to make the missile "even faster and more maneuverable than the current AMRAAM".