HOW LONG AVERAGE WOULD IT TAKE TO EARN CORPORAL IN THE US ARMY AS MY MOS 63 BRAVO MECHANIC?

E-4 Corporal is considered junior NCO rank in the Army and not everyone gets that rank.. Usually E-4's are given the rank of Specialist but as far as the speed of which you climb in rank all depends on you...but id say like 2 to 3 years..