The Bar rifle in Call of Duty: WW2 is a slower firing, high damage automatic rifle. The Bar is good at medium range and can compete with submachine guns at close range. However, it is better to stay back a little and hold an advantageous position with cover that reduces your profile. You will want to be looking at the middle of the fight and push for objectives with the Bar. The best attachments for the Bar are those that help you whilst aiming down the sights and give you an advantage when you are surprised by a submachine gun wielding enemy. Use the quickdraw attachment to bring up the Bar’s sights faster.
Use the grip attachment to better control the recoil of the Bar which helps, especially at medium range. Use the reflex sight for a clear view of the enemy. The best division for the Bar is infantry as it grants you an extra attachment and gives you more starting ammo which the Bar doesn’t have much of. The best basic training is lookout which lets you spot enemies from further away often showing you enemies that you didn’t even know where there. Use your favorite secondary in case you run out of ammo and the mk 2 fragmentation grenade to help clear tight areas and objectives. Here is the best class setup for the Bar..
As found on Youtube