Go to hitman's resource pack on the nexus here and download the archive of reload animations. The one you are looking for is probably the Sig 553 reload or the "Bushmaster M4 reload". Really, any of them that contain 2hareloadf should work. Then, set up a folder hierarchy that looks like: Meshes-->characters--->_1stperson, where the "_1stperson" folder contains the 2hareload.kf. Then drag and drop into your data folder. Hope that fixes it.