File:Nielsen device area of YHM Cobra .45 suppressor.jpg

{{Information

|Description=This is the rear half of a Yankee Hill Machine "Cobra .45" .45-caliber pistol suppressor. The Nielsen device (also called a muzzle booster, recoil booster, or piston) is housed inside the suppressor at the rear.

|Source=I created this work entirely by myself.

|Date=June 2008

|Author=ConquerorPBN (talk)

|other_versions=

}}

{{self|cc-by-3.0}}

{{Copy to Wikimedia Commons|bot=Fbot|priority=true}}