The TangoDown ACB-4 Bipod was designed to be a quick and lightweight bipod with minimal ergonomic impact to the M16/M4/MK 11-type weapon systems. Features full motion of cant and traverse for rapid settling on uneven ground and to aid in tracking moving targets. The legs silently deploy at the push of a button and extend when needed with a simple pull. Designed using light weight aluminum forgings and advanced polymers throughout to save weight and maintenance. The ACB-4 Bipod attaches directly to any MIL-STD 1913 Picatinny 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.