This suited RO:Ost's gameplay, but not this game's.
Everyone except the anti-tanker has an effective run-n-gun weapon against infantry. Most servers just disable tanks. It can be quite fun to snipe infantry with the AT rifle on Pavlov's house, but really it can't do anything (useful) that the bolters can't. You certainly don't have enough ammo to be blowing away wooden boards from windows.
It's a class I enjoy playing as a change, but you're seriously disadvantaging yourself by choosing it at the moment.
I would have to disagree and usually when the class is available on such maps as Pavlov's House and Fallen Fighters, I pick it.
Riflemen have the mobility, they have the speed, they have the range, but it can still take more than one shot to take an enemy down and they're useless against tanks..... not to mention the lack of penetration of the rifle rounds on some objects.
The ATR has the ability to one-shot kill infantry, they can shoot through most objects to hit their target with that one-hit kill...... they have the firepower against tanks & other future vehicles, and the bullet drop of the ATR is basically nonexistent, thus greater range than the bolt rifle.
Both the AT Class and Riflemen can be decent at both Defense and Offense, however Riflemen are better off as offense than AT guys and AT guys are better at defense due to firepower and range, in that they can take down the enemy at longer ranges, with one round, and can put up a fight against armored vehicles.
And again, if I need to, I can switch to the pistol and easily dispatch enemies at close/medium range.