sporter 9mm bolt stop

[j wolf]

my colt ar 9mm has broken two bolt stops in the last 2000 rounds.upon inspection i found the stop has to much front and rearward play putting all the stress on the smallest portion were the rollpin goes through.the colt mags make dirrect contact with the stop.the lower were the stop fits does not look worn.i wonder if saw is getting parts that are inferior .any info on this concearn.  thanks