Reliant 10134 4-Piece Ammo Box 30 Cal Green, Tan Plastic 4 Pieces This 4-piece ammo box is ideal for your 30 cal rounds. All four pieces have a green finish. The 30 cal boxes have dimensions of 11.50" x 5.25" x 7.25" and the crate has 19" x 15.75" x 8". NOTE: These boxes do not have dividers.