Charles Ellicott Commentary 1 Chronicles 12:2

"They were armed with bows, and could use both the right hand and the left in slinging stones and in shooting arrows from the bow: they were of Saul`s brethren of Benjamin." — 1 Chronicles 12:2 (ASV)

Armed with bows. —Literally, drawers of the bow (2 Chronicles 17:17).

And could use. —They were ambidextrous, with stones, and with arrows on the bow. The left-handed slingers of Benjamin were famous from long ago (Compare to Judges 20:16 and 1 Chronicles 3:15).

Of Saul’s brethren — i.e., his fellow-tribesmen.

Of Benjamin is added to make it clear that Saul’s immediate kinsmen are not intended (Compare to 1 Chronicles 12:29).