It's difficult to see exactly how it was used.
Yup, that’s it. Not exactly as I remembered it, but a picture is worth a thousand words. Thanks.
A description of how it was used in spoiler font below...
It's some kind of collapsible baton. He showed it (collapsed) to the man in front of him (Corin's first pic) then activated it as he swept his arm back to strike (and take out) the man behind him.
Very smoothly done, actually... ol' Ben's had hand-to-hand combat training, methinks.
