The invention concerns a gun sling, gun equipment set, and methods of carrying a gun. The sling comprising a strap, a first buckle through which the strap passes so as to form a first length-adjustable loop, a second buckle through which the strap passes so as to form a second length-adjustable loop, a first gun attachment swivel arranged to the first loop, and a second gun attachment swivel arranged to the second loop. According to the invention, the strap is unitary and the first and second gun attachment swivels are capable of freely running along the first and second loops, respectively. The invention allows for versatile carry methods of rifle-type guns.