Stuck at a rank?

Okay… I’m stuck at 120, and I’ve been stuck before at 100… does anyone know why 343 likes to **** with my head… because I’ve been stuck at 100 for 2 weeks for some reason then I advanced out of nowhere to 101… And yeaaaa I understand its just a gameee and I have no lifeee yadiyadaa… I just wanna know why I’m stuck, I deserve to rank up just like everyone else… so if you can help me please do so. I called xbox customer support TWICE and I guess they didn’t know what I was talking about because they’re such great old workers that know about halo 4. So perhaps one of my fellow gamers can assist.

It happens at multiples of ten, right?

Once you finish a Specialization (a set of ten ranks), you need to select another to move onto before you can continue earning XP.

Have you been enlisting in specializations?

I’m stuck at SR-130.
I know that’s the max rank.