Used for picking up military equipment (4)
I believe the answer is:
arms
'military equipment' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for arms that I've seen before include "See 11" , "See 12" , "you'll find in the gunroom" , "Appendages" , "Crest - guns" .)