unlimber

To deploy an artillery piece for firing (ie, to detach it from its limber).

(by extension) To clumsily put into employ a large weapon or object.

To unsling something, as a backpack, carried on the body with a strap; to bring something carried into the hands for use.

To stretch muscles, limbs, etc., that have been cramped or unused for some time.

Not limber; lacking flexibility.