ACR Gas Block

100% shapes (with no white shapes either), spawns both at preset size and detail size with an ACR 14.5" barrel and an ACR gas tube. Recolorable for the most part after one ungroup. For better results, color the bottom part a darker "shade" of your desired color (example: the tube part is 666666 while the bottom part is 555555).

 

Pastie; credit if used.

 

Reference pic

Done