The Striderpostor gunners are one of the variations the Striderpostors, being the most common and basic ones. They have lack of any special ability besides having a minigun at the bottom part of their torso.
They are commonly quicker and more more agile than other Striderpostors because of them being the main fighters of the Striderpostor armies. But they have a lack of physical strenght due to most of their power and utility coming from their ranged attacks.
Groups of them can easily take out armies, so even if they're basic variations they're still no joke. Be cautious around them!