You can increase the power of your primary weapon by collecting "P" items.

Only one Proficiency can be put on a primary weapon.

Tanks, which were used to support infantry, changed to primary weapon.

A team is effective so long as its primary weapon remains operational.

Innovation takes center stage as the "primary weapon of competition."

Not only starting, but being one of their primary weapons, as he is with the Giants?

Those spears seem to be their primary weapon, so they've probably had lots of training with them.

Studies show that the immune system and its primary weapons are affected by stress.

For once, though, the starting pitching is not necessarily the primary weapon.

Due to this, he uses a hammer as his primary weapon.