unsling

verb (used with object), un·slung, un·sling·ing.

1. to remove (something) from being slung: to unsling a rifle from one’s shoulder.
2. Nautical. to take off the slings of; release from slings.

verb -slings, -slinging or -slung (tr)

1. to remove or release from a slung position
2. to remove slings from