FN-15 carbine question

[Slater]

In reference to this carbine, does "heavy barrel" mean the typical M4A1 SOCOM contour or a heavier profile?

https://fnamerica.com/products/fn-15-series/fn-15-carbine/

[Renegade04]

Usually, with an M4 type barrel, that indicates a SOCOM profiled barrel, but the barrel FN uses on this FN-15 may just be heavier profile without the M203 cut-out like the SOCOM profile has. One can always call FN to find out once and for all.

[Slater]

Sounds good. My handguard-fu is weak, but this carbine is advertised with single heat shield handguards. I'm guessing that FN military M4A1's have double heat shield handguards (or not?)

[MistWolf]

Usually, with an M4 type barrel, that indicates a SOCOM profiled barrel, but the barrel FN uses on this FN-15 may just be heavier profile without the M203 cut-out like the SOCOM profile has. One can always call FN to find out once and for all.

Not all Colt SOCOM barrels have the 203 cut under the handguard.