▁new ▁inter com , ▁new ▁interior ▁and ▁command ▁and ▁control ▁systems . ▁In ▁addition , ▁the ▁upgrad ed ▁M 1 1 3 s ▁come ▁in ▁three ▁versions ▁mainly ▁based ▁on ▁the ▁level ▁of ▁protection : ▁ ▁F 1 ▁- ▁Ve h icle ▁with ▁fragment ation ▁protection ▁( sp all - lin er ). ▁ ▁F 2 ▁- ▁Ve h icle ▁with ▁fragment ation ▁and ▁mine ▁protection . ▁ ▁F 3 ▁- ▁Ve h icle ▁with ▁fragment ation ▁and ▁mine ▁protection , ▁additional ▁arm or ▁protection ▁and ▁a ▁new ▁engine . ▁Furthermore , ▁a ▁fourth ▁variant , ▁the ▁M 1 1 3 F 4 , ▁has ▁been ▁developed , ▁but ▁it ▁was ▁ultimately ▁set ▁aside ▁in ▁favor ▁of ▁FF G ' s ▁AC SV , ▁which ▁is ▁based ▁on ▁the ▁P MM C ▁G 5 . ▁ ▁List ▁of ▁Norwegian ▁M 1 1 3 ▁variants : ▁ ▁N M 1 2 5 ▁() ▁- ▁Norwegian ▁variant ▁of ▁the ▁M 1 1 3 ▁similar ▁to ▁the ▁M 1 0 6 ▁mort ar ▁car rier , ▁but ▁with ▁an ▁ 8 1   mm ▁M 2 9 ▁mort ar . ▁ ▁N M 1 3 5 ▁() ▁- ▁Norwegian ▁variant ▁of ▁the ▁M 1 1 3 A 1 ▁with ▁a ▁ 2 0 mm ▁Rhein met all ▁M K 2 0 2 0 ▁machine ▁can non ▁with ▁a ▁ 7 . 6 2 mm ▁co ax ial ▁machine ▁gun ▁in ▁a ▁tur ret . ▁The ▁ 2 0 mm ▁gun ▁had ▁a ▁firing ▁rate ▁of ▁about