This Accu-Tac BR-4 G2 Arca Swiss bipod is machined (not cast) from billet 'aircraft' aluminum
(a sturdy aluminum alloy).
The aluminum is provided with an anodized layer with a hardness of type III (mil-spec).
Both legs are adjustable in length in six positions by simply pulling them out using a ratchet system.
Retraction is automatic using spring force by pressing the lever.
The entire bipod can be canted slightly around the vertical axis and fixed with a lever.
The legs can be angled forward for extra reach and stability.