 City police say the man they arrested on a gun charge in West Baltimore Monday is already on probation on an armed robbery charge. Officers spotted the 31-year-old in the 2200 block of Bryant Avenue at about 7 o'clock last night. When the suspect began to walk away, police discovered a gun where he had been sitting. Officers seized the gun, and while they were arresting the suspect, a second gun fell from his waistband. Police say one of the guns was reported stolen, the suspect taken to Central Booking.