Voodoo Tactical's TGR Case is designed to carry an M4 along with any 51in long rifle. They have provided adjustable cinch-down straps for both weapons with a padded protective divider between them. The outside features a diagonal zipper that provides access to left and right side storage areas for a jacket, gloves, poncho, mat, etc. They have also provided a drag loop for attaching a carabiner and when not in use, the loop can be stored inside the soft hook-n-loop pocket that will also accommodate your name tag on the outside.
For hands-free carry, you can utilize the removable padded, adjustable shoulder harness or the removable padded shoulder strap. Includes a double wrapped web carry handle.