The same way you would reach other ranks: play matchmaking, do daily challenges, and go for commendations
It is unlocked at the rank of Colonel on Halo: Reach and costs 1,200 CR
Reach Lt. Colonel first, then check the price.
Lt. Colonel
Lieutenant Colonel grade 1
SOFT CASE - Colonel, 100,000 cR
An elite rapes him. Then he gets shot 5 times in the chest. Second person: haha very funny. were you the elite because no colonal died in halo reach as of what i know.
By getting to Leiutenant Colonel rank you unlock the CQC shouloders to buy in the Armory.
At the point were you get 600,000 cR you will be a COMMANDER! This is the rank after Lt. Colonel Grade 3.
there are sniper shoulders in halo reach i dont know what that guy was smoking check youtube.
You unlock the Grenadier Shoulders at the rank of Colonel, they cost 65,000 cR.
Brigadier is after Colonel.
The Commando helmet in Halo: Reach is unlocked at the rank of Commander (600,000 total cR and +60,000 from the previous rank which is Lt. Colonel Grade 3). It costs 85,000 cR