I found the the 3 beam ammo's - Metroid Prime 2: Echoes
Jan 12th 2005, ID#3085
I found the the 3 beam ammo's but the 4th won't open work sheiny said
4 - Sky Temple Grounds - Profane Path - Use the portal in the Sacred Path to get to this room, then use the Annihilator Beam and Echo Visor on the Echo Keys.
The order of the keys is: far right, near right, left and far right.
That wasn't too hard, Except I couln't find the 4 key lock.
The first three are there but the fourth is hidden somewhere and I can't find it.
Not with any visor.