"The [57mm] 6-pounder first saw action in May 1942 at the Battle of Gazala. It made an immediate impact on the battlefield as it was able to penetrate any enemy tank then in service."
The enemy tanks are not the only thing it’s able to efficiently penetrate it would seem. Also, why are British local news sites universally abysmal to use?
"The [57mm] 6-pounder first saw action in May 1942 at the Battle of Gazala. It made an immediate impact on the battlefield as it was able to penetrate any enemy tank then in service."
https://en.wikipedia.org/wiki/Ordnance_QF_6-pounder