Staking a carrier key

[Tackdriver VillenTactical]

Long story short, I have a BCG with a carrier key that just doesn't appear to have been staked. There are little dimples where someone attempted to stake it, but it will be loose in no time. Can I just chisel this to stake it or is something else better?

Dave

 

[vellnueve]

MOACKS

 

[wahsben]

A center punch, The MOACKS and also Brownells sells a tool for staking too.