SAR 21
First revealed and subsequently adopted by the Singapore Armed Forces ( SAF ) in 1999 , it was designed and developed over a four-year period and was intended to replace the locally license-built M16S1 by the Ministry of Defence ( MINDEF ) , Singapore Army and the Chartered Industries of Singapore ( CIS , now ST Kinetics ) . 
<triplet> Singapore Armed Forces <subj> Singapore Army <obj> has part <triplet> Singapore Army <subj> Singapore Armed Forces <obj> part of