Noobs? What about you running out of ammo with scar. It has about 375 rounds and decent damage how do you manage to just run out? The only reason I can come up with why you would need two assault rifles worth of ammo is because you're a spammer. Really, learn to use semi-auto and aim to the head before judging.
It was six man suicidal manor, the team was camping the middle cave. We had two support holding the back facing the trader (two because their sucked), a medic healing them full time because they sucked. A useless firebug at the front with me (he should've just changed perk, there's just not enough distance for DOTs to work). A crossbow sharpshooter who's actually good but had to deal with scrake and FP from both direction and therefore only used crossbow and me, sweeping the front.
So I had to kill about 75% of the specimen every wave, with the remaining ones coming from the back taken care of by the supports and FP and Scrakes by the sharp. I kept both SCAR and AK-47 on semi the entire game and scored mostly headshoots and still on wave 9 I ran out of ammo for both guns with about 20 specimens left, so had to get the 9mm for the last handful. My kill was well into the 4 digits by then already.
Now that I think about it, you probably never tried such combination and are only trying to look pro by immediately calling noob any kind of thinking outside the box or playing in a way that wasn't directly intended by the creators. Really just think a little before making such dumb statement as the commando/scar/M32 combination turns out to be one of the most powerful considering it doesn't use overpowered sharp weapons.
No, no experienced commando use it because it sucks. It doesn't even kill gorefast on a direct hit even in the hands of demo 6. Against crowds you're much better off just shave off all their heads with an assault rifle. Not to mention it's pointless against Scrakes because of the explosive resistance (here's a hint: two assault rifle + katana), and I doubt it will kill and FP even with 6 nades. Better off just letting the sharpshooter kill it with one bolt.
God help you if you were around in early retail, were commandos have to try to beat suicidal where the ONLY assault rifle around was bullpup.