M4-C noob

Bear with me for a short setup story....

So, I was in a 2v2 Haken GM a few minutes ago. Midway through the 5 games (I went 9-1 btw, it might be relevant) a 2nd LT 5th class (Higher than me) joins on the BL side. My partner went 1-9, so it was basically me versus the two ghosts. One had a Kukri (he was a staff sarg), and the LT had the wrench.

Anyway, I was on the top "window" by A with my Black Market M4A1-custom (not from the coupons), when suddenly I heard, from below, "CLANKCLINKCLANKCLICKCLANK". I looked down and saw a ghost (the LT) running around, so I lit him up. He dropped the bomb, so I patrolled the area. Outside the door, I heard the staff sarg in the GR spawn. I shot at his breath, and, about 10 bullets later, hit blood. He died shortly thereafter.

It was after this that the LT began spamming "NOOB HAK! M4 CUSTOM NOOOOOB!". I just shook my head at the hakusation, but the M4-C part gave me pause. Are M4A1-C's now considered "noob" like the M12s? Or was it just the QQ'ing of a poor soul upset because his wrench didn't make him any better?

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