This is a US PeaceKeeper Rifle Case known as the M4 Rapid Assault Tactical, model P30032.
US PeaceKeeper MRAT Case is designed for a M4 or similar length carbine with collapsible stock. Specifically designed for officers who have limited space in their vehicles. Same quality as the US PeaceKeeper RAT cases but with no outside pocket. In main compartment" (2) wide elastic straps to carry two (2) rifle magazines (double-stacked) and removable hook and loop straps to secure carbine. Wrap-around handle for easy carry.
Wrap-Around Carry Handles
Padded Shoulder Strap
Adjustable Straps for Securing Rifle