sta ette ▁ 1 2 0 mm ▁mort ar ▁for ▁the ▁previously ▁installed ▁weapon . ▁Swiss ▁M 1 0 6 A 1 ' s ▁initially ▁had ▁subst it uted ▁a ▁Thompson ▁Brand t ▁mort ar ▁of ▁ 8 1 mm ▁type ▁for ▁the ▁standard ▁ 4 . 2 "/ 1 0 7 mm ▁M 3 0 ▁mort ar ▁found ▁on ▁US ▁models . ▁Min en wer fer pan zer ▁ 6 4 / 9 1 ▁- ▁Up grad ed ▁version . ▁ ▁Min en rä ump an zer ▁ 6 3 / 0 0 ▁- ▁Mine clear ing ▁vehicle , ▁based ▁on ▁the ▁SP z ▁ 6 3 / 8 9 ▁and ▁fitted ▁with ▁light weight ▁mine ▁clear ing ▁pl ough s . ▁The ▁tur ret ▁was ▁removed ▁and ▁replaced ▁with ▁an ▁arm ored ▁work ▁station ▁for ▁the ▁operator . ▁ ▁Über mitt lung span zer ▁ 6 3 ▁- ▁Sign als ▁vehicle . ▁ ▁Taiwan ▁▁ ▁C M - 2 1 ▁- ▁a ▁Taiwan ese ▁ind igen ous ▁design ▁based ▁on ▁the ▁M 1 1 3 , ▁with ▁many ▁improvements ▁and ▁design ▁changes ▁to ▁meet ▁Republic ▁of ▁China ▁Army ▁requirements . ▁The ▁size , ▁shape ▁and ▁performance ▁of ▁the ▁C M - 2 1 ▁is ▁almost ▁identical ▁to ▁the ▁M 1 1 3 , ▁but ▁with ▁different ▁engines ▁and ▁transm issions ▁throughout ▁the ▁years . ▁Vari ous ▁variants ▁produced ▁from ▁ 1 9 8 2 ▁to ▁ 2 0 0 9 , ▁over ▁ 1 0 0 0 ▁produced . ▁ ▁C