Click on the appropriate file below to download the assembly instructions for you product. http://www.battlelineindustries.com/bli-new/sites/default/files/SAPR_SOPMOD_Instructions_0.pdf http://www.battlelineindustries.com/bli-new/sites/default/files/SAPR_Magpul_Instructions.pdf http://www.battlelineindustries.com/bli-new/sites/default/files/S.A.M.%20Instructions.pdf