over ▁from ▁the ▁M 1 ▁Gar and ▁was ▁fully ▁completed ▁in ▁the ▁active - d ut y ▁component ▁of ▁the ▁Army ▁( with ▁the ▁exception ▁of ▁the ▁sni per ▁variants , ▁which ▁were ▁introduced ▁in ▁World ▁War ▁II ▁and ▁saw ▁action ▁in ▁Korea ▁and ▁Vietnam ). ▁The ▁Gar and ▁remained ▁in ▁service ▁with ▁the ▁Army ▁Reserve , ▁Army ▁National ▁Guard ▁and ▁the ▁Navy ▁into ▁the ▁early ▁ 1 9 7 0 s . ▁The ▁South ▁Korean ▁Army ▁was ▁using ▁M 1 ▁Gar ands ▁in ▁the ▁Vietnam ▁War ▁as ▁late ▁as ▁ 1 9 6 6 . ▁ ▁Due ▁to ▁w ides p read ▁United ▁States ▁military ▁assistance ▁as ▁well ▁their ▁dur ability , ▁M 1 ▁Gar ands ▁have ▁also ▁been ▁turning ▁up ▁in ▁recent ▁conflicts ▁such ▁as ▁with ▁the ▁ins ur gen cies ▁in ▁Ira q ▁and ▁Afghan istan . ▁ ▁Some ▁military ▁dr ill ▁teams ▁still ▁use ▁the ▁M 1 ▁rif le , ▁including ▁the ▁U . S . ▁Marine ▁Corps ▁Sil ent ▁Dr ill ▁Team , ▁the ▁United ▁States ▁Air ▁Force ▁Academy ▁Cad et ▁Honor ▁Guard , ▁the ▁U . S . ▁Air ▁Force ▁A ux ili ary , ▁almost ▁all ▁Reserve ▁Officer ▁Training ▁Corps ▁( RO TC ) ▁and ▁some ▁Junior ▁Reserve ▁Officer ▁Training ▁Corps ▁( J RO TC ) ▁teams ▁of ▁all ▁branches ▁of ▁the ▁U . S . ▁military . ▁ ▁Design ▁details ▁ ▁Fe atures ▁ ▁The ▁M 1 ▁rif le ▁is ▁a ▁. 3 0 ▁cal iber , ▁gas - oper ated , ▁ 8 ▁shot