Good evening to you!! In the world of AR-15s you can expect a heavy barrel to be about 1" in thickness. mid weight barrels may be .75" and light barrels just over .5" Heavies are designed for rigidity to keep harmonics dampened and the larger outside surface area helps the barrel cool better for longer life. The down side is the added weight over a regular skinny barrel. Hope this helps. Have a good rest of your day.
🇺🇸🇺🇸 'Merica' 🇺🇸🇺🇸

Quite thicker than a regular barrel. Hence, improved accuracy.

It's simply thicker, which makes it heavier than standard barrels.

Hi Johnnell and welcome. A "Heavy Barrel" has a thicker material between the inside hole and outside diameter compared to the standard barrel. Example shown with these handguns but also applies to any firearm; -- thearmorylife.com/bulls-vs-bushings-which-1911-barrel-system-is-better/ -------- Cheers, stay safe and happy holidays!

Thicker than a regular barrel, thus heavier.