Hey Marines - an 0313 question

[CS1983]

My buddy's son is shipping out to MCRD San Diego in a few days. He enlisted with 03xx, with the hopes of being an 0311. Apparently his recruiter just told him that he is now going to be on LAVs, so I assume 0313.

I was under the impression that 0313 was a post-ITB assignment (or perhaps when one gets there?) and the Marine Corps didn't pre-slot recruits for anything aside from 03xx, and all decisions for 31, 13, etc. were made at ITB.

Is it possible that they have pre-ID'ed recruits who meet a certain ASVAB line score metric for assignment to 0313, and he happens to be one? Or could it just be the Recruiter dicking with him to see how bad he wants to be a Marine vs just wants a particular MOS?

As far as 0313, I'm under the impression it's much like the Army's 19D, which I was. However, do the 0313's ever get to do dismount work, or is that an 0311 role for scouts?

As a 19D, I wasn't always stuck in a crew position and was sometimes a dismount, etc. Reading some forum posts elsewhere, it sounds like the 0313s are kinda shafted on the dismount portion of the LAR mission.

Just trying to understand what exactly is going on here.

Thanks for any insights.

ETA: He just clarified. 21xx. Yuck. A friggin' mechanic.