The TangoDown ACB-4 Bipod was created to add quick” longer-range capability to the current M16A4/ M4 / MK 11-type weapon systems with minimal ergonomic or weight impact. Full motion of cant and traverse were designed-in for rapid settling on uneven ground and to track moving targets. Legs silently deploy at the push of a button and extend” when needed” with a simple pull. They used light weight aluminum forgings and advanced polymers throughout to save weight and maintenance. The ACB-4 attaches directly to any MIL-STD 1913 rail” and legs fold closely to the weapon for a low” snag-free profile. When used with the BPM-1 adapter” the ACB-4 will mount to most bolt action rifles.