aver . ▁The ▁M aus er ▁M ▁ 9 8 ▁rif le ▁series ▁can ▁also ▁be ▁ordered ▁with ▁an ▁optional ▁M aus er ▁horizontal ▁ 3 - position ▁safety ▁with ▁lock ing ▁lever ▁to ▁ensure ▁good ▁oper ability ▁of ▁the ▁safety ▁catch ▁le aver ▁with ▁low ▁mounted ▁aim ing ▁opt ics . ▁ ▁Bar rel ▁The ▁standard ▁bar rel ▁length ▁is ▁▁ 6 0 0   mm ▁( 2 3 . 6 2   in ) ▁for ▁the ▁M ▁ 9 8 ▁and ▁ 6 2 0   mm ▁( 2 4 . 4 1   in ) ▁for ▁the ▁M ▁ 9 8 ▁Mag num ▁variant . ▁Other ▁bar rel ▁lengths ▁are ▁available ▁upon ▁request ▁for ▁the ▁M ▁ 9 8 ▁and ▁M ▁ 9 8 ▁Mag num ▁variant , ▁subject ▁to ▁avail ability . ▁As ▁an ▁option ▁the ▁rif les ▁can ▁be ▁ordered ▁with ▁an ▁integral ▁bar rel . ▁This ▁is ▁a ▁bar rel ▁with ▁a ▁quarter ▁rib , ▁sight ▁bases ▁and ▁a ▁s ling ▁sw ivel ▁mount ing ▁mach ined ▁out ▁of ▁a ▁solid ▁bar rel ▁blank . ▁ ▁Am mun ition ▁feed ing ▁The ▁internal ▁magazine ▁of ▁the ▁M ▁ 9 8 ▁system ▁consists ▁of ▁an ▁integral ▁box ▁mach ined ▁to ▁match ▁the ▁cart ridge ▁for ▁which ▁the ▁rif le ▁was ▁being ▁chamber ed , ▁with ▁a ▁det ach able ▁floor plate , ▁that ▁can ▁hold ▁up ▁to ▁ 5 ▁standard ▁s ized ▁rif le ▁cart rid ges . ▁The ▁magazine ▁can ▁be ▁loaded ▁with ▁single ▁r ounds ▁by