Urban Riot Bot

Shield Bash. If the Urban Riot Bot moves at least 20 feet straight toward a creature and then hits it with the Shield Bash attack on the same turn, that target must succeed on a DC 14 Strength saving throw or be knocked prone and flung 10ft. If the target is prone, the Urban Riot Bot can use it's movement and make another attack with its Retractable Blade against the same target as a bonus action.

Multiattack. The Urban Riot Bot makes two attacks, using one of either it's Retractable Blade,  Rifle, or Shield Bash attacks.

Retractable Blade. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) slashing damage.

Shield Bash. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (3d6+3) bludgeoning damage.

Heavy Crossbow (Rifle). Ranged Weapon Attack: +3 to hit, range 100/400 ft., one target. Hit: 6 (1d10 + 1) piercing damage.