Pronunciation: [ɹˈi͡əɹ ɒv bˈaɹə͡l] (IPA) 
The correct spelling of the phrase "rear of barrel" is /rɪər ʌv ˈbærəl/. The "r" at the beginning of "rear" is pronounced with a soft, almost silent "r" sound, while the "ea" diphthong is pronounced with a long "e" sound, like in "bee". The "ar" in "barrel" is pronounced with a short "a" sound followed by the "r" sound. Overall, the spelling accurately represents the pronunciation of the phrase.
Rear of barrel refers to the back or posterior part of a cylindrical or tubular structure known as a barrel. A barrel typically consists of a long, hollow, and cylindrical body, often made of metal, in which various substances may be stored or transported. The rear of the barrel specifically denotes the end of the barrel that is opposite to the front or muzzle.
In the context of firearms, the rear of the barrel is the part where the bullet comes out when fired. It is where the cartridge is placed and ignited, releasing high-pressure gases that propel the bullet forward. The rear of the barrel is typically designed to accommodate the insertion and secure placement of the ammunition.
Furthermore, the rear of the barrel often features the firearm's action, which includes components such as the firing mechanism, reloading mechanisms, and sights. These elements aid in the firing process and help the shooter find their target accurately.
In other applications, such as distilleries or wineries, the rear of the barrel refers to the final end where liquids are stored or aged. The rear end of a barrel often features a plug, stopper, or closure mechanism to prevent leakage or allow for controlled extraction.
Overall, the rear of the barrel refers to the posterior section of a cylindrical container, particularly in relation to firearms or storage vessels, assisting in the propulsion of a bullet or storage/aging of liquids.
