Is this a correct assessment of barrel profiles?:
Going from lightest/thinnest to heaviest:
1)"Lightweight" Barrel: consistently thin from upper receiver to FH sometimes called "pencil" thin
2)"Gov't Profile": Thin under handguards/heavier up front for 203
3)"Medium Contour" (ala CMMG Inc.): I'm guessing consistent thickness for length of barrel somewhere between gov't profile and Hbar
4)"H-Bar": Thick Contour for entire length of barrel
I searched for definitions but couldn't find one unified answer. If I have missed any please let me know (I purposely left out the M4 profile because I wasn't sure how to categorize it).
Thanks in advance.
Basically you have it correct. Medium varies depending on who's barrel. Anywhere from a consistant 0.75" for the entire barrel, up to a .8something (SPR type). Heavys are in the .95 to 1" range to the FS then 0.75" after.
Bull Barrels are 1" the entire length (chamber to muzzle).
M4 would be a 'Govt Profile" as that is what the Govt uses, and it fits the bill. It just adds a notch for the M203.
Thanks. I figured I was pretty close but just wanted to get a concrete answer on the subject.