Gun platform walkers such as Imperial Guard Sentinels and Eldar War Walkers can fight in close combat as Dreadnoughts. Unfortunately their low Strength and number of Attacks means they are simply not very good at it!
Other Walkers In Assaults
Source: Core Rulebook 3E, p. 91
Gun platform walkers like Imperial Guard Sentinels and Eldar War Walkers fight in close combat as Dreadnoughts do, but their low Strength and Attacks make them poor at it.