Duckbill

A Duckbill choke is an attachment for shotguns that flattens the weapon's firing pattern, diverting pellets more towards the sides.

Duckbill chokes saw action in the Vietnam War by US Navy SEALs, where they were reported to be very effective against groups of enemies.

The duckbill choke is susceptible to fractures due to the blast pushing the two halves apart.

Battlefield 4
Battlefield 4 includes the Duckbill as one of several optional chokes for most shotguns.

Its effect on single projectiles such as 12 Gauge Frag and 12 Gauge Slugs is not yet known.