Editing Muzzle brake (section)

== Ported chamber ==
A [[Chamber (firearms)|barrel chamber]] with pressure relief ports that allows gas to leak around the cartridge during extraction. Basically the opposite of a fluted chamber as it is intended for the cartridge to stick to the chamber wall making a slight delay of extraction. This requires a welded-on sleeve with an annular groove to contain the pressure.<ref>{{cite web | url=https://patents.google.com/patent/US20150247694A1/en | title=Firearm barrel assembly with ported chamber }}</ref>