Bullet Belt: Genuine Metal Brass 5.56 Calibre with Copper HeadsGenuine bullet belt made from 5. 56 calibre rounds with heads as used in the SA80 and M16 Assault Rifles by NATO Forces. Brass cases with copper tips. The belt can be shortened by pushing bullets out of the link to achieve the length required, there is no stretch to this belt. 5 sizes available instore S to XXL Small 37" (82 rounds) Medium 47" (102 rounds) Large 56" (122 rounds) XL 65" (142 rounds) XXL 73" (162 rounds) also available 10 bullet