. ▁During ▁the ▁sie ge ▁of ▁the ▁cam ps , ▁the ▁squad rons ▁fle w ▁ 1 4 7 ▁sort ies ▁and ▁exp ended ▁ 2 , 3 8 0 , 1 6 1 ▁ 7 . 6 2 mm ▁r ounds ▁and ▁ 2 1 , 7 9 6 ▁ 2 0 mm ▁r ounds . ▁They ▁also ▁ill umin ated ▁drop ▁zones ▁for ▁C - 7 A ▁Car ib ous ▁res upp lying ▁the ▁cam ps . ▁From ▁ 3 ▁April ▁to ▁ 3 1 ▁May , ▁the ▁AC - 1 1 9 G s ▁based ▁at ▁Tan ▁Son ▁N h ut ▁tested ▁a ▁port able ▁U H F ▁receiver ▁for ▁signals ▁transm itted ▁by ▁ground ▁sens ors . ▁On ▁ 1 8 ▁April , ▁Sh adow ▁ 7 7 ▁picked ▁up ▁signals ▁in ▁a ▁sensor ▁field , ▁firing ▁nearly ▁ 6 , 0 0 0 ▁ 7 . 6 2 mm ▁r ounds ▁that ▁night ▁and ▁ 2 8 , 5 0 0 ▁r ounds ▁on ▁the ▁next ▁night ▁after ▁again ▁detect ing ▁movement , ▁as ▁well ▁as ▁assist ing ▁an ▁a irst rike ▁in ▁the ▁area . ▁ 1 5 0 ▁enemy ▁bodies ▁were ▁discovered ▁and ▁ 1 7 ▁prisoners ▁captured ▁along ▁with ▁nine ▁crew - ser ved ▁weapons ▁and ▁ 6 7 ▁individual ▁weapons ▁in ▁a ▁subsequent ▁ground ▁swe ep . ▁After ▁the ▁conclusion ▁of ▁the ▁testing ▁period , ▁the ▁final ▁assess ment ▁recommended ▁that ▁the ▁rece ivers ▁be ▁perman ently ▁placed ▁in ▁the ▁AC - 1 1