The phrase "equip himself" is grammatically correct and is commonly used in written English.
It means to provide or prepare oneself with the necessary tools, skills, or resources for a particular task or situation. Example: The new employee was told to equip himself with a strong work ethic and time management skills in order to succeed in his new position.
Having resolved to do his duty, he set out to equip himself for its performance.
He himself took up Sanskrit, to equip himself for the preparation of a vast digest of Hindu and Muslim law.
In what was to be a final attempt at orthodox employment, Herman studied surveying at Lansingburgh Academy to equip himself for a post with the Erie Canal project.
Instead of reading theology straight away, he chose to equip himself with an adequate background for studying the Bible by reading oriental languages.
A man determined to win would equip himself with a research operation that could provide in-depth information on foreign- and domestic-policy issues.
And so there must be some other factor in the situation that would make it unreasonable or impracticable to require the arresting officer to equip himself with a search warrant.
Muḥammad ibn Tughluq also planned to face the Mongols by positioning and equipping himself at a safe distance from the northwest.
Darwin equipped himself with weapons, books (Fitzroy gave him the first volume of Principles of Geology, by Charles Lyell), and advice on preserving carcasses from London Zoo's experts.
And this grandstanding (and leaping, sliding and hopping) actor and monologuist has equipped himself with the requisite accessories, including a blackboard and an industriously wielded eraser.
Earlier this year, following Cronje's confession, Prabhakar equipped himself with a hidden camera and videotaped a number of private conversations with players and administrators.
In trademark fedora and dark glasses, he'd equipped himself with a backing band whose playing was magnificently assured, The Van Morrison groove was very much intact, never more so than in gorgeously relaxed renditions of crowd favourites "Moondance" and "Brown Eyed Girl".
