Shallex asks:

"Why do bots never use M4A1 or USP?"

BOT Zane responds:

"BOTs, just like human players, all have weapons preferences. For example, BOT Brett and BOT Quade both are proficient with the M4A1."

BⒶkⒶは大好き⑨ asks:

"which BOT are proficient with the AK47?"

BOT Zane responds:
"Those same BOTs will use the AK when they are on T side."