Grimlock is the dimwit with only brawn and raw power. In its robot form, Grimlock is more where it shines, that is if you are able to overlook its short stubby arms inherited from its stubby dino legs.
JetFire Voyager class Tranformers classic has tonnes of gimmicks. Backpack/Booster , arm armor, gun and a battle helm.
JetFire Armaments displayed
JetFire in robot mode with armaments the beefy mode , its head is re-immagine of the takatoku macross VF-1S toy . The shame is it lacks of articulation at its joints connecting the hips and the legs.