>>9810556>>9810614It's breaching tip for bracing the shotgun against a door handle while leaving standoff so you don't damage yourself or your shotgun with over pressure or miss the shot due to bracing a hard slidey gun muzzle against a hard slidey doorknob.
It is a pretty mall ninja version though and definitely made to LOOK like a Viitnam era duckbill, but an actual duckbill is a cut barrel not a muzzle device threaded outside the barrel.
Pic related, not the spikey front for securely lodging the muzzle into wooden doors.
