Merchant is a special encounter in Fallout Tactics.
In this encounter, you'll find a merchant surrounded by several armed guards. You can trade items and ring pulls to the merchant for a number of weapons, including an FN FAL, Gauss pistol, and a Browning M2.
The guards are equipped with various small guns, including an AK47 and 9mm M9FS Beretta.
In the patched version ( v 1.27 ); the merchant will not sell the Browning M2 however he will still drop it when he dies. The guards will use a Pancor Jackhammer instead of an AK47.