I am level 4 certified in MACP. The highest level you can go in Army Combatives.
I did a ton of Judo, kickboxing, and BJJ purple before I ever got into the Army. I was level 0 and tapping level 4's when they gave us their rudimentary training. It was garbage. Basic Gracie Jiu Jitsu garbage. At the time there were a couple of drills and a few submissions. In a 40 hour course you probably got 2 hours of actual rolling in. And probably less than 20 hours of technique training by dubious instructors. That was around 2006.
Now in 2012 I got my level 3 and 4.
Level 3 is no joke. 160 hours of training. Every single day you are rolling. First week focuses on boxing. Second week focuses on kickboxing. Third on putting it all together. Fourth week culminates in tactical body armor with weapons, etc. Each week you have 3 bouts in whatever week you are in - example: Week 1 you will have 3 rounds of boxing full out with someone. Week 2 kickboxing 3 bouts. Etc. The final week are honor grad bouts with pancrase rules 1x10min round for each weight class. Dudes are getting fucked up.
But keep in mind the program has changed. They are trying to add more combat focused stuff in there while trying to make you a competent fighter. How to pull a resisting suspect out of a car through the window, 2 on 1 scenarios, grappling matches where the instructor suddenly drops a stun gun on the ground nearby, guys in blauer suits are jumping you trying to take your M4 away after tackling you.
This whole thing about "grappling" got a bad rap in the Army. First, they sucked at teaching it. Second, it doesn't work very well in a full kit. So now the emphasis is becoming more tactically focused.
Now the level 1 certification teaches just very, very basic skills. The average soldier *MIGHT* remember the armbar and scissor sweep in a month - but probably not. They do a punch drill where they must achieve a clinch 4x on the instructor while they are wearing boxing gloves punching the students. The culminating event now is an "action front/rear" drill where guys in Blauer suits face off against students in body armor, helmet, and a weapon. Usually the student just gets tackled.
So to sum this huge post up: The Army is moving away from a grappling focused curiculum and towards a tactical response that centers on using your weapon first, having your buddy arrive soon, and not to get caught up rolling around on the ground.
Take a look at what the Army is really looking for these days in Combatives:
http://www.benning.army.mil/infantry/197th/combatives/
Yeah, as muh as it's TRUE that military training is a terrible way to learn to fight (and especially grapple), it's not a very fair criticism. Grappling pretty irrelevant, and it would be a waste to put any significant time into it.