ridge ▁case ▁extra ction . ▁The ▁M ▁ 9 8 ▁b olt ▁action ▁will ▁cycle ▁correctly ▁ir res pective ▁of ▁the ▁way ▁the ▁rif le ▁is ▁moved ▁or ▁position ed ▁during ▁the ▁b olt ▁cy cling ▁action ▁or ▁if ▁the ▁cart ridge ▁has ▁been ▁fired ▁or ▁not . ▁Only ▁if ▁the ▁b olt ▁is ▁not ▁brought ▁back ▁far ▁enough , ▁sharp ly ▁enough , ▁in ▁a ▁controlled ▁round ▁feed ▁b olt ▁action ▁the ▁cart ridge ▁case ▁may ▁not ▁be ▁clean ly ▁e ject ed ▁and ▁a ▁jam ▁may ▁result . ▁ ▁The ▁b olt ▁houses ▁the ▁firing ▁pin ▁mechanism ▁that ▁gets ▁co ck ed ▁when ▁the ▁b olt ▁is ▁opened ▁and ▁the ▁co ck ing ▁piece ▁pro tr udes ▁vis ually ▁and ▁tact ile ly ▁from ▁the ▁rear ▁of ▁the ▁b olt ▁to ▁indicate ▁the ▁action ▁is ▁co ck ed . ▁This ▁b olt ▁sle e ve ▁lock ▁was ▁not ▁present ▁on ▁previous ▁M aus er ▁b olt ▁action ▁designs ▁and ▁reduced ▁firing ▁pin ▁travel ▁and ▁lock ▁time . ▁ ▁The ▁action ▁features ▁large ▁gas ▁relief ▁holes ▁and ▁a ▁gas ▁shield ▁on ▁the ▁b olt ▁sle e ve ▁designed ▁to ▁protect ▁the ▁users ▁head ▁in ▁case ▁of ▁a ▁primer ▁or ▁cart ridge ▁ru pt ure ▁or ▁det on ation . ▁When ▁the ▁action ▁suff ers ▁a ▁cat ast roph ic ▁failure ▁it ▁is ▁designed ▁to ▁def lect ▁the ▁de br is ▁away ▁from ▁the ▁operator ' s ▁face . ▁ ▁The ▁M aus er ▁M ▁ 9 8 ▁b olt ▁mechanism ▁can ▁be