ARMASPEC ST-45, Short Throw Safety Selector, drop in

SHOW AND TELL: ARMASPEC ST-45, Short Throw Safety Selector, drop in.
Evaluation of an example of one : A wear channel formed allowing detent to escape from detent hole.
Possible solution: replace the shaft with proper fitting replacement shaft.

[@drcoffee5588]

Have you tried changing the detent pin. Possibly a pin with a sharper point would keep it in the track better. Or you pin is worn out and no longer has a point on it. Or the pin was install backwards and the flat side is contacting the safety.
You showed what came in the package: safety and wrench, but you didnt show the pin. If it wasnt included, that would be your problem. Curious minds want to know

[@JustTheARplatform]

Good suggestions all, but unfortunately the 'damage is done'. The next step as a workaround is to replace the center shaft of the ST-45 that has the damage. Luckily, I have access to a supply of parts, so I opted to try a different brand. The pin appeared to be a standard brass pin, which raises the question of how could it damage the center shaft of the lever.
Under magnification, I could see where the leading edge of the hole eroded, allowing the pin to eventually escape, and then continue to carve a new canal. My instincts scream metallurgical issues.

[@joemorganeatmyshortschannel]

Sorry bro i dont ambi safety i always leave mine in the fire position unless i chamber a round

[@JustTheARplatform]

Ever try 'other' hand shooting? In those cases, Ambi is useful with long waits to fire, where one may be forced to keep the safety on until an allowed target enters the approved FOF.

[@JustTheARplatform]

Another technique is the right hand trigger finger, and right thumb on right side of grip, using thumb to control lever from the right side.