Lenses must be sufficiently dark enough to obscure the costumer's eyes. They may be flat or bubbled. Acceptable colors are: black, smoke, dark green, or silver.
The body of the "ears" may be black or gray. The bars have three or four bumps and may be left the same color as the body or painted black.
The frown must have either 6 or 8 teeth cut out and any coloring must not leave the indented area. Acceptable colors are: black, gray or silver. If there are spaces between the teeth the wearer's face must not be seen
The tube stripes are black in color and may number between 9 and 15 per side with the curve bends extending backwards. These may be hand painted or decals. There does not need to be the same number per side.
Vocoder (vertically ribbed chin detail) may be black or silver.
The aerators (cylinders on either side of the vocoder) are black, and screening maybe silver or black.
Traps (trapezoids on dome of helmet) and tears (area beneath the corners of eye lenses) may be: hand painted, decals. Acceptable colors are: black or gray. Rear traps and tears may have vertical black lines.
Note: The FX helmet is considered deprecated (to be avoided), though is acceptable for Legion requirements.
Note: A stock (out of the box) MRCE and/or EFX PCR helmet does not meet the basic 501st requirements without the major modification that are necessary.